pc-400 420 430 service manual canon

COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)

SERVICEMANUALREVISION 0

FY8-13F2-000JAN.1998


IMPORTANT

Use of this manual should be strictly

supervised to avoid disclosure of

confidential information.

THIS DOCUMENTATION IS PUBLISHED BY CANON INC., JAPAN, TO SERVE AS ASOURCE OF REFERENCE FOR WORK IN THE FIELD.SPECIFICATIONS AND OTHER INFORMATION CONTAINED HEREIN MAY VARYSLIGHTLY FROM ACTUAL MACHINE VALUES OR THOSE FOUND IN ADVERTISING ANDOTHER PRINTED MATTER.

ANY QUESTIONS REGARDING INFORMATION CONTAINED HEREIN SHOULD BEDIRECTED TO THE COPIER SERVICE DEPARTMENT OF THE SALES COMPANY.

THIS DOCUMENTATION IS INTENDED FOR ALL SALES AREAS, AND MAY CONTAININFORMATION NOT APPLICABLE TO CERTAIN AREAS.

COPYRIGHT © 1998 CANON INC.

Printed in JapanImprimé au Japon

Prepared by

OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DEPARTMENT 1OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DIVISION

CANON INC.

5-1, Hakusan 7-chome, Toride-shi, Ibaraki 302 Japan

COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON) i

This Service Manual provides information needed to service the plain paper copiersFC200/PC400(120V model), FC220/PC420(120V model), and PC430(LGL model) inthe field.

The FC200/PC400 differs from the FC220/PC420/PC430 for the following:

INTRODUCTION

This Service Manual consists of the following chapters:

CHAPTER 1, “General Description,” introduces the copier’s features and specifica-tions, shows how to operate the copier, and explains how copies are made.

CHAPTER 2, “Basic Operation,” provides outlines of the copier's various mechanicalworkings.

CHAPTER 3, “Exposure System,” discusses the principles of operation used for thecopier's lens drive unit and scanner drive unit. It also explains the timing at which thesedrive units are operated, and shows how they may be disassembled/assembled andadjusted.

CHAPTER 4, “Image Formation System,” discusses the principles of how imagesare formed. It also explains the timing at which the various units involved in image for-mation are operated, and shows how they may be disassembled/assembled and adjust-ed.

CHAPTER 5, “Pick-Up/Feeding System,” explains the principles used from whencopy paper is picked up to when a copy is delivered in view of the functions of electricaland mechanical units and in relation to their timing of operation. It also shows how theseunits may be disassembled/assembled and adjusted.

CHAPTER 6, “Fixing System,” explains the principles used to fuse toner images totransfer media in view of the functions of electrical and mechanical units and in relationto their timing of operation. It also shows how these units may be disassembled/assem-bled and adjusted.

CHAPTER 7, “Externals/Auxiliary Mechanisms,” shows the copier's external parts,and explains the principles used for the copier's various control mechanisms in view ofthe functions of electrical and mechanical units and in relation to their timing of opera-tion. It also shows how these units may be disassembled/assembled and adjusted.

CHAPTER 8, “Installation,” introduces requirements for the site of installation, andshows how the copier may be installed using step-by-step instructions.

CHAPTER 9, “Maintenance and Servicing,” provides tables of periodically replacedparts and consumables/durables and scheduled servicing charts.

CHAPTER 10, “Troubleshooting,” provides tables of maintenance/inspection, stan-dards/adjustments, and problem identification (image fault/malfunction).

Appendix contains a general timing chart and general circuit diagrams.

Model Manual pick-up Multifeeder AE

FC220/PC420/PC430 Not available Available Available

FC200/PC400 Available Not available Not available

COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)ii

The following rules apply throughout this Service Manual:1. Each chapter contains sections explaining the purpose of specific functions and

the relationship between electrical and mechanical systems with reference to thetiming of operation.

In the diagrams, represents the path of mechanical drive where a sig-nal name accompanies the symbol , the arrow indicates the direction of theelectric signal.

The expression "turn on the power" means flipping on the power switch, closingthe front door, and closing the delivery unit door, which results in supplying themachine with power.

2. In the digital circuits, '1' is used to indicate that the voltage level of a given signalis "High," while '0' is used to indicate "Low." (The voltage value, however, differsfrom circuit to circuit.)

In practically all cases, the internal mechanisms of a microprocessor cannot bechecked in the field. Therefore, the operations of the microprocessors used in themachines are not discussed: they are explained in terms of from sensors to theinput of the DC controller PCB and from the output of the DC controller PCB to the loads.

Note:The descriptions in this Service Manual are subject to change without notice forproduct improvement or other purposes, and major changes will be communicatedin the form of Service Information bulletins.All service persons are expected to have a good understanding of the contents ofthis Service Manual and all relevant Service Information bulletins and be able toidentify and isolate faults in the machine.

COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON) iii

CONTENTS

CHAPTER 1 GENERAL DESCRIPTION

I. FEATURES ..................................1-1II. SPECIFICATIONS .......................1-2III. NAMES OF PARTS .....................1-4

A. External View..........................1-4B. Cross Section .........................1-5

IV. OPERATION ................................1-6A. Control Panel ..........................1-6

1. PC420/430/FC220.............1-62. PC400/FC200....................1-7

B. Making Copies ........................1-8C. Jam Indicator.........................1-11D. Add Paper Indicator ..............1-11E. Replacing the Cartridge ........1-11

1. Time to Replace the Cartridge.........................................1-11

2. Replacing the Cartridge ...1-12F. Changing the Density ...........1-14G. Cleaning................................1-14

1. Copyboard Glass/Copyboard Cover ...............................1-14

2. Lens Array .......................1-153. Pick-Up Roller..................1-16

H. When Not Using the Copier for a Long Time .............................1-16

V. IMAGE FORMATION .................1-17A. Outline.....................................1-17

CHAPTER 2 BASIC OPERATION

I. BASIC OPERATION ....................2-1A. Outline ....................................2-1B. Outline of Electrical Circuit......2-2C. Basic Sequence of Operations

(A4, 2 copies)..........................2-3D. Main Motor Control Circuit ......2-5

1. Outline ...............................2-52. Operation ...........................2-53. Overcurrent Sensor ...........2-5

E. Inputs to DC Controller ...........2-6

1. Inputs to DC Controller (1/2)...........................................2-6

2. Inputs to DC Controller (2/2)...........................................2-7

F. Outputs from DC Controller ....2-81. Outputs from DC Controller

(1/2) ...................................2-82. Outputs from DC Controller

(2/2) ...................................2-9

CHAPTER 3 EXPOSURE SYSTEM

I. EXPOSURE/COPYBOARD DRIVESYSTEM ......................................3-1

A. Outline of Exposure System ...3-1B. Copyboard Drive System........3-1

1. Outline ...............................3-12. Controlling the Copyboard

Drive ..................................3-33. Mechanism of Copyboard

Drive Assembly..................3-4II. Controlling the Scanning Lamp....3-7

A. Outline ....................................3-7B. Operations ..............................3-8

1. Turning the Scanning Lamp

ON and OFF ......................3-82. Controlling the Intensity of the

Scanning Lamp..................3-8C. Controlling the Intensity of the

Scanning Lamp (VR604) ........3-8III. MECHANICAL SYSTEM..............3-9

A. Scanning System..................3-101. Detaching the Scanning Lamp

Unit ..................................3-10B. Copyboard Drive Assembly...3-11

1. Detaching the CopyboardDrive Assembly ................3-11

COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)iv

CHAPTER 4 IMAGE FORMATION SYSTEM

I. PROCESS DESCRIPTION..........4-1A. Outline ....................................4-1B. Sequence of Image Formation

Operations (A4, 2 copies) .......4-2C. Primary Charging Control Circuit

................................................4-31. Outline ...............................4-32. Operations .........................4-4

D. Controlling Developing Bias....4-61. Outline ...............................4-62. Operations .........................4-8

E. Transfer Charging Control Circuit..............................................4-10

1. Outline .............................4-102. Operations .......................4-11

F. Document Density Measurement(AE; PC420/430/FC220).......4-14

1. Outline .............................4-142. Operations .......................4-143. Adjusting the AE Mechanism

(VR602, VR603) ..............4-15II. CHARGING, DEVELOPING, AND

CLEANING SYSTEMS ..............4-17A. Cartridge ...............................4-17

1. Outline .............................4-17III. MECHANICAL SYSTEM............4-18

A. Photosensitive Drum.............4-191. Cleaning the Drum...........4-19

B. Transfer Charging Roller.......4-201. Cleaning the Transfer

Charging Roller................4-202. Detaching the Transfer

Charging Roller................4-20

CHAPTER 5 PICK-UP/FEEDING SYSTEM

I. OUTLINE .....................................5-1II. CONTROLLING THE PICK-UP

ROLLER.......................................5-2A. PC420/430/FC220 ..................5-2B. PC400/FC200 .........................5-3

III. CONTROLLING THEREGISTRATION ROLLER...........5-4

A. Outline ....................................5-4B. Pick-Up/Feeding Timing Chart

(A4, 2 copies)..........................5-5IV. CHECKING FOR JAMS...............5-6

A. Delivery Delay Jam.................5-61. PC420/430/FC220.............5-62. PC400/FC200....................5-6

B. Delivery Stationary Jam..........5-71. PC420/430/FC220.............5-72. PC400/FC200....................5-7

C. Pick-Up Delay Jam(PC420/430/FC220)................5-8

D. Pick-Up Stationary Jam ..........5-91. PC420/430/FC220.............5-92. PC400/FC200....................5-9

E. Paper is present at the pick-up ordelivery sensor at time of power-on or when the Copy Start key ispressed. ..................................5-9

V. MECHANICAL SYSTEM............5-10A. Pick-Up Roller Assembly.......5-11

1. Detaching the Pick-Up Roller.........................................5-11

B. Registration Roller Assembly..............................................5-14

1. Detaching the RegistrationRoller Assembly...............5-14

C. Removing the Separation Pad..............................................5-15

CHAPTER 6 FIXING SYSTEM

I. OUTLINE OF OPERATIONS .......6-1A. Outline ....................................6-1B. Controlling the Fixing Heater

Temperature............................6-3

C. Controlling the Supply Power tothe Fixing Heater ....................6-3

D. Protection Mechanisms ..........6-5II. MECHANICAL SYSTEM..............6-6

A. Fixing Assembly......................6-7

COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON) v

CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS

I. POWER SUPPLY ........................7-1A. Outline ....................................7-1B. Power Supply PCB .................7-2C. Protection Mechanism for Power

Supply Circuit..........................7-2II.MECHANICAL SYSTEM .................7-3

A. External Covers ......................7-41. Detaching the Control Panel

Cover .................................7-42. Detaching the Body Cover

...........................................7-53. Detaching the Top Cover

Assembly ...........................7-74. Detaching the Delivery

Assembly Cover.................7-7

5. Detaching the Bottom Cover...........................................7-8

B. Copyboard Assembly..............7-91. Detaching the Copyboard

Cover .................................7-92. Detaching the Copyboard ..7-9

C. DC Controller/DC Power SupplyPCB.......................................7-11

1. Detaching the DCController/DC Power SupplyPCB..................................7-11

2. Points to Note When Installingthe Delivery Door Switch .7-13

D. Control Panel PCB................7-141. Detaching the Control Panel

PCB .................................7-14

CHAPTER 8 INSTALLATION

I. SELECTING THE SITE ...............8-1II. UNPACKING AND INSTALLATION

.....................................................8-2

III. RELOCATING THE MACHINE ....8-5

CHAPTER 9 MAINTENANCE AND SERVICING

I. PERIODICALLY REPLACED PARTS.....................................................9-1

II. DURABLES..................................9-1III. PERIODICAL SERVICING ..........9-1IV. NOTES ABOUT CARTRIDGE .....9-2

A. Storing Sealed Cartridges.......9-2

B. Storing and Handling UnsealedCartridges ...............................9-3

1. Storing Unsealed Cartridges...........................................9-3

2. Handling the Cartridge.......9-3

CHAPTER 10 TROUBLESHOOTING

I. MAINTENANCE AND INSPECTION...................................................10-3

A. Image Adjustment BasicProcedure .............................10-3

B. Points to Note .......................10-4II. STANDARDS AND

ADJUSTMENTS ........................10-5A. Mechanical............................10-5

1. Image Leading Edge Non-Image Width (position of whitepaint on back of glass).....10-5

2. Image Leading Edge Margin

1. Construction.......................6-72. Detaching the Fixing

Assembly ...........................6-7

3. Removing the Fixing UpperUnit ....................................6-9

4. Detaching the Pressure Roller.........................................6-11

COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)vi

(point of detection forregistration)......................10-5

B. Electrical ...............................10-61. Adjusting the Intensity

(VR604) ...........................10-62. Adjusting the AE Mechanism

(VR602, VR603) ..............10-8III. IMAGE TROUBLESHOOTING 10-11

A. Making Initial Checks ..........10-111. Site Environment............10-112. Checking the Documents

.......................................10-113. Checking the Copyboard

Cover and Copyboard Glassfor Dirt and Scratches ....10-12

4. Checking the Lens Array forDirt .................................10-12

5. Checking the TransferCharging Roller..............10-12

6. Checking the FeedingAssembly .......................10-12

7. Checking the Copy Paper.......................................10-12

8. Checking the Durables ..10-129. Others ............................10-14

B. Samples of Image Faults ....10-16C. Troubleshooting by Image Fault

............................................10-171. The copy is too light (halftone

areas only). ....................10-172. The copy is too light (dark

areas as well).................10-173. The copy is too light

(extremely light overall)..10-174. The copy has uneven density

(darker at front). .............10-185. The copy has uneven density

(lighter at front). .............10-186. The copy is foggy (overall).

.......................................10-187. The copy is foggy (paper feed

direction). .......................10-198. The copy has dark lines

(paper feed direction,relatively narrow). ..........10-19

9. The copy has dark lines(paper feed direction, thin)........................................10-19

10. The copy has white spots(paper feed direction).....10-19

11. The copy has white lines(paper feed direction).....10-19

12. The copy has white spots

(cross feed direction). ....10-2013. The back of the copy is soiled.

.......................................10-2014. The copy has faulty fixing.

.......................................10-2115. The copy has faulty leading

edge registration (blank areamuch too wide). .............10-21

16. The copy has faulty leadingedge registration (blank areatoo wide). .......................10-21

17. The copy has faulty leadingedge registration (no blankarea). .............................10-21

18. The copy has a blurred image........................................10-22

19. The copy is foggy (cross feeddirection). .......................10-22

20. The copy has poor sharpness(focus)............................10-22

21. The copy is blank...........10-2322. The copy is solid black...10-23

IV. TROUBLESHOOTINGMALFUNCTIONS.....................10-24

A. Troubleshooting Malfunctions............................................10-24

1. (self diagnosis;PC400/FC200)...............10-24

2. E0 ..................................10-243. E2 ..................................10-254. E6 ..................................10-255. E9 ..................................10-266. AC power is absent........10-267. Pick-up fails. ..................10-278. The scanning lamp fails to go

ON. ................................10-279. The main motor fails to rotate.

.......................................10-2810. The copyboard fails to move.

.......................................10-2811. (paper feeding normally)

.......................................10-2912. (at time of jam) ..........10-2913. The fixing heater fails to

operate...........................10-29V. TROUBLESHOOTING PAPER

FEED PROBLEMS ..................10-30A. Copy Paper Jams ...............10-30

1. Pick-Up Assembly..........10-312. Separation/Feeding Assembly

.......................................10-313. Fixing/Delivery Assembly

.......................................10-32

COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON) vii

B. Feeding Faults ....................10-331. Double Feeding .............10-332. Wrinkles .........................10-33

VI. FUNCTIONS AND ARRANGEMENTOF ELECTRICAL PARTS ........10-34

A. Sensors and Solenoids.......10-34B. Switches .............................10-35C. Lamp, Heater, Motor, and Others

............................................10-36D. Printed Circuit Board (PCB)10-37E. Variable Resistors (VR) and

Check Pins by PCB ............10-381. DC Controller/DC Power

Supply PCB ...................10-382. Control Panel PCB.........10-39

VII. SELF DIAGNOSIS...................10-40

APPENDIX

A. GENERAL TIMING CHART .........A-1B. SIGNALS/ABBREVIATIONS LISTA-3

1. Signals....................................A-32. Abbreviations..........................A-4

C. GENERAL CIRCUIT DIAGRAM...A-5D. SPECIAL TOOLS TABLE.............A-7E. SOLVENTS/OILS TABLE .............A-8

COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1

CHAPTER 1

GENERAL DESCRIPTION

I. FEATURES ..................................1-1II. SPECIFICATIONS .......................1-2III. NAMES OF PARTS .....................1-4

A. External View..........................1-4B. Cross Section .........................1-5

IV. OPERATION ................................1-6A. Control Panel ..........................1-6B. Making Copies ........................1-8C. Jam Indicator.........................1-11

D. Add Paper Indicator ..............1-11E. Replacing the Cartridge ........1-11F. Changing the Density ...........1-14G. Cleaning................................1-14H. When Not Using the Copier for a

Long Time .............................1-16V. IMAGE FORMATION .................1-17

A. Outline.....................................1-17

This chapter outlines the machine's specifications and how it may be operated.



Blank Page



1-1

I. FEATURES1. Direct charging.

The charging roller directly charges paper, significantly reducing ozone emission.

2. Auto power-off.The copier shuts off automatically when left alone for about 5 minutes after the last

copy operation.

3. Quick start.The copier’s wait time is 0 second, always ready for quick copying work.

4. Cartridge type.The core of the copier (photosensitive drum, toner case, charging roller, developing

assembly, and cleaning assembly) is integrated into a single cartridge. The user needno more than replace the cartridge and perform simple cleaning to maintain the copierin top condition.

5. Variety of copy effects.In addition to black toner, the user has a choice of several colors. Taking advantage

of overlay copying, various copy effects may be obtained through mere replacement ofthe cartridge.

6. Compact and light.The copier is compact and light, providing good portability. It can easily substitute

as a personal copier.

7. Multifeeding (PC420/430/FC220).A stack of copy paper may be placed on the pick-up tray. A press on the Copy Start

key is all it takes to generate multiple copies.

COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)1-2


II. SPECIFICATIONSItem

Body Portable (w/ grips)

Copyboard Moving

Light source Tungsten lamp of fuse type

Lens Lens array

Photosensitive medium OPC (24 dia.)

Typ

e

Copying Indirect electrostatic

Charging Roller (direct charging)

Exposure Slit (moving copyboard)

Copy density adjustment

Development Dry

Pick-up

Separation Curvature + Static eliminator

Cleaning Blade

Fixing Plane heater

Sys

tem

Document type Sheet, Book, 3-D object (2 kg/4.4 lb max.)

Maximum document size LTR/A4; LGL*

Reproduction ratio 1:1 (±1.2%)

Wait time 0 sec (approx.; at 20°C/68°F)

First copy 22 sec (LTR)

Continuous copying Not available

Copying speed

Copy size A4/LTR; LGL* max.; postcard min.

52 to 128 g/m2, Tracing paper, Colored paper, OHP film, Postcard (vertical), Labels, Wrapping paper (63 g/m2)

Copy paper type

Two-sided copying

Overlay copying

Copy tray 9 copies (approx.; A4/LTR, 80 g/m2)

Non-image width 2 mm (leading edge)A4: 0 mm (left/right)LTR/LGL: 2 mm (left/right)

Auto power-off Available (5 min, approx.)

Per

form

ance

*PC430 only.

PC400/FC200 PC420/430/FC220

Manual Automatic (AE) or Manual

Manual tray Multifeeder

4 copies/min (approx.; A4R/LTR-R or smaller)

4 copies/min (A4R/LTR-R or smaller)3 copies/min (LGL)

• Same edge orientation.• Copying on each side no more

than twice.

• Paper of 64 to 128 g/m2.

• Paper of 64 to 128 g/m2. • Copying on each side no more than three times.

Multifeeder tray 5 mm deep (about 50 sheets of A4, 80 g/m2)

1 to 9 copies or F



1-3

Item

7.5° to 32.5°C/45.5° to 90.5°F

Oth

ers

TemperatureOperating environment

Humidity

Atmospheric pressure

5% to 85%

810.6 hPa to 1013.3 hPa (0.8 to 1 atm)

Serial numbers

ZTG (PC400:WHITE)ZTH (PC400:GRAY)

120V, 60Hz

Power supply

0.7 kW or lessMaximumPower consumption

Standby

Continuous

0.1 W (approx.; 5 min; reference only)

0.2 kWh (reference only)

Ozone 0.01 ppm or less (average over 8 hr)

71 dBCopying

StandbyNoise

14.1 in./359 mmWidth

Dimensions Depth

Height

15.7 in./402 mm

4.1 in./108 mm

Weight (including cartridge) 16.6 lb/7.4 kg (approx.)

Keep wrapped to protect against humidity.Copy paper

Cartridge See CHAPTER 9.Consumables

Sound power level by ISO

PC400/FC200 PC420/430/FC220

Serial numbers

NVD

(FC220:WHITE)ZTJ

(PC420:WHITE)

RTL/PTQ

(FC200:WHITE)UTP/UTQ

230V, 50Hz RTM/PTR (FC220:WHITE)PTS (FC220:WHITE)PTT (FC220:WHITE)

Specifications subject to change without notice.



III. NAMES OF PARTSA. External View(PC420/430/FC220) (PC400/FC200)

q Copyboard coverw Copyboard glasse Pick-up trayr Open/Close button

t Delivery assembly cover open/close button

y Delivery assembly coveru Copy tray

➀

➁

➂

➃➄➅➆

➀

➁

➂➃

➄

➀

➁➂

➃

➄

➅

Figure 1-301A

q Upper cover w Pick-up guidee Density correction switchr Power switcht Cartridge

Figure 1-302A



1-5

B. Cross Section(PC420/430/FC220)

(PC400/FC200)

q Copyboard coverw Copyboard glasse Cleaning assemblyr Primary charging rollert Scanning lampy Lens arrayu Developing cylinderi Registration rollero Pick-up roller

!0 Pick-up tray!1 Transfer charging roller!2 Photosensitive drum!3 Fixing assembly!4 Delivery roller!5 Delivery tray!6 Heat exhaust fan!7 Delivery assembly cover

open/close button

14 1317 16 15 1112

1031 2 4 5 6 7 8 9

12 11 98

Figure 1-301B



IV. OPERATIONA. Control Panel1. PC420/430/FC220

6 4 5

CAAE

Error indications : Check jam/Supply paper : Jam and : Check error and : Check error and : Check error

darker

lighter

ON OFF

lighter darker10

3

1 2 4 5 6 7 8

9

q Density Control Dialw AE key

• Press it to select/deselect AE(automatic exposure) mode.

e AE Indicator• ‘A’ goes ON when AE mode is

selected.• ‘A’ goes OFF when AE mode is

deselected.r Jam Indicator

• Flashes when paper jams insidethe copier.

t Copy Count Indicator• Displays the number of copies

entered by pressing the CopyCount Set key.

• The count decreases for each copymade; the init ial number isdisplayed after the last copy hasbeen made.

• ‘ ’ is displayed to indicate pick-upfailure or absence of paper; ‘ ’ isdisplayed in response to an errorfound by self diagnosis.

y Copy Count Set Key• Each press on the key increases

the copy count (up to 9).• A press while ‘ ’ is displayed

causes ‘ ’ to appear, indicating allsheets on the pick-up tray will beused for continuous copying.

u Clear/Stop Key• During continuous copying, the key

serves as a Copy Stop key; theoperation stops after finishing theongoing copy.

• During standby, the key serves as aClear key, setting the copy count to‘ ’.

i Copy Start Keyo Power Switch!0 Density Correction Switch

• Switches copy density among threesettings (top for darker, bottom forlighter).

• The density is switched by varyingthe developing bias.

Figure 1-401A



1-7

(right view)

2. PC400/FC200

Figure 1-402A

lighter darker

ON OFF

31

2

4

5

q Density Control Leverw Density Indicatore Jam Indicator

• Flashes when paper jams insidethe copier.

• Goes and remains ON when anerror (self diagnosis) occurs in thecopier.

r Main Indicator• Remains ON when copying is

ready.t Power Switch



B. Making Copies1) Switch the copier ON.

• If necessary, wait until the intensity of the scanning lamp reaches the specifiedvalue.

• The wait time is about 0 second.• The copier will shut itself off in about 5 minutes if left alone without key operation.

2) Lift the copyboard cover, and place a document face down, along the size index.• Place the document so that its center is at on the size index (Figure 1-401B);

then, close the copyboard cover.

Figure 1-401B

3) Adjust the copy density to suit the document.4) Slide the pick-up guide to suit the size of copy paper.5) Set copy paper on the pick-up tray.

PC420/430/FC220Place a stack of copy paper of a size suited to the document on the pick-up tray;

make sure the edges of the sheets are flush.• The stack may be 5 mm (about 50 sheets of plain paper).

Document

Size index

Figure 1-402B

6) Set the copy count.

PC420/430/FC220Set the number of copies to make (1 to 9 or F) using the + key, and check the Copy

Count indicator.

Figure 1-404B

Note:Take away each OHP film delivered to the copy tray.



1-9

7) Press the Copy Start key.

PC420/430/FC220• To stop continuous copying, press the Clear/Stop key; the copier finishes the

ongoing copy and stops. The copy count displays the initial count.

Copying on OHP Film• Set one sheet of film on the pick-up tray for each copy.• Depending on the environment of the site, a press on the Copy Start key may not

pull the film inside the copier; if this is the case, perform the following:

1) Place copy paper under the film; stagger the sheet and film so that the leading edgeof the film is about 1 cm behind that of the paper.

Figure 1-403B

2) Hold the trailing edge of the copy paper, and set the sheet and film on the pick-uptray.

3) While holding the trailing edge of the copy paper, press the Copy Start key.Remove the paper when the film begins to move into the copier; the paper will nolonger serve its purpose.

1cm1cm

Manual Feeding

PC400/FC2001) Set a document on the copyboard.2) Adjust the Density Control lever to suit the document.3) Slide the pick-up guide to suit the size of copy paper.4) Insert copy paper along the pick-up guide.

• The copier starts copying operation automatically as soon as it detects paper.• To continue copying, insert the next paper when the copyboard starts to return.

Making Two-Sided Copies1) Turn over the copy while maintaining its feeding direction.

• Make sure that the paper is not moist or curled.• Use paper of 64 to 128 g/m2 when making two-sided copies.• Do not process each side more than twice.

Figure 1-405B

Making Overlay CopiesYou can make two- or three-colored copies by replacing the cartridge.• Use paper of 64 to 128 g/m2 when making overlay copies.• Do not process each side more than three times.





1-11

C. Jam IndicatorThe Jam indicator starts to flash when paper jams inside the copier.• Take care not to tear the paper when removing it; otherwise, be sure to remove all

pieces of paper.

1) Move the copyboard to the left until it stops.2) Press the open/close button, and open the top cover.3) Remove the jam.

• If the jam is in the pick-up or fixing assembly, hold the edge of the paper with bothhands, and pull it out slowly through the opening of the top cover.

• If the jam is in the delivery assembly, press the delivery assembly open/closebutton to open the delivery cover; then, detach the paper from the delivery cover,and pull it slowly in the direction of delivery.

4) Close the top cover and delivery cover; then, move the copyboard to the center.• To resume copying, switch the copier ON, set the desired copy count, and set the

copy density.

D. Add Paper IndicatorPC420/430/FC220‘ ’ flashes if you try to make a copy when the pick-up tray has run out of paper.

1) Check the pick-up tray for copy paper.2) If no paper is on the tray, place paper.

If a stack of paper is on the tray, remove it first, then place it back after putting itsedges flush.

3) Press the Copy Start key.• ‘ ’ goes OFF, and the remaining number of copies are made.

E. Replacing the Cartridge1. Time to Replace the Cartridge

When the cartridge is running out of toner, copies tend to show white lines or verticalwhite spots (Figure 1-401E).

Figure 1-401E



If white lines or spots appear on copies, replace the cartridge as follows:

1) Remove the cartridge from the copier, and rotate it several times as shown in Figure1-402E.

Figure 1-402E

2) Set the cartridge back in the copier, and make a copy.a. If the output returns to normal,

• The cartridge may be used further; advise the user, however, to obtain a sparecartridge.

b. If the output fails to return to normal,• Replace the cartridge as described below.

2. Replacing the Cartridge1) Move the copyboard to the left until it stops; then, press the open/close button to

open the top cover.2) Slide the cartridge out of the copier.3) Hold the cartridge with the Warning label facing up, and rotate it about 90 degrees in

both directions.

Figure 1-403E

Figure 1-405E

6) Close the top cover, and return the copyboard to the center.

Note:You can replace the black toner cartridge with any color cartridge the same way.



1-13

4) Detach the tip of the seal attached to the cartridge, and pull it straight out to thefront; about 50 cm.

Figure 1-404E

5) Hold the cartridge with its Warning label facing the left, and insert it in the copier withcare until it butts against the rear.

Figure 1-401F

Note:You can also switch the density among three settings in manual density adjustmentmode.

G. CleaningAdvise the user to clean the following if the copies are soiled.

1. Copyboard Glass/Copyboard CoverWipe the part with a moist cloth; then, dry wipe it.If dirt cannot be removed, wipe the part using mild detergent; then, dry wipe it.



F. Changing the DensityPC420/430/FC220You have a choice of three settings for automatic density adjustment mode (AE);

switch the density if the copy is too dark or too light.

Density Correction Switch

Auto density correction



1-15

2. Lens Array1) Move the copyboard to the left until it stops.2) Put a cotton wad in the lens array groove, and move it back and forth lightly.

Fiber lens (face side)

Figure 1-401G

3) Open the upper cover, and remove the cartridge.4) Put a flat-tipped cotton wad in the lens array (rear) groove, and move it back and

forth.

Figure 1-402G



3. Pick-Up Roller1) Open the top cover.2) Dry wipe the pick-up roller while rotating it in pick-up direction with a cloth.

Note:Do not make copies until the pick-up roller has completely dried.

Pick-up roller

Figure 1-403G

H. When Not Using the Copier for a Long Time

Advise the user to perform the following if she/he does not have any plan to use thecopier for a long time.

1) Disconnect the power plug.2) Place the copier in a dust-free, sunlight-free place.

Fixing film

Primary charging roller

Scanning lamp

Cleaningblade

Developing blade

Lens array

Developingcylinder

Transfer charging roller

Static eliminator

Pressure roller

Copyboard glass

Photo-sensitive drum



1-17

V. IMAGE FORMATIONA. Outline

Figure 1-501A

The copier is an indirect photoreprographic system constructed as shown inFigure 1-501A.

The image formation process consists of seven steps as discussed below.

Step 1 : Primary charging (negative)Step 2 : Image exposureStep 3 : Development (AC and DC bias)Step 4 : Transfer (negative)Step 5 : SeparationStep 6 : FixingStep 7 : Drum cleaning Figure 1-502A

The photosensitive drum has a layerconstruction: the photoconductive layeron the outside and the conductive aluminum base, inside.

Figure 1-503A

Delivery

: Flow of copy paper: Rotation of drum

4. Transfer

Latent static Image Formation

2. Image exposure

3. Development7. Drum cleaning

RegistrationMultifeeder

6. Fixing 5. Separation

1. Primary charging

Photoconductive layer

Aluminum base


CHAPTER 2

BASIC OPERATION

I. BASIC OPERATION ....................2-1A. Outline ....................................2-1B. Outline of Electrical Circuit......2-2C. Basic Sequence of Operations

(A4, 2 copies)..........................2-3

D. Main Motor Control Circuit ......2-5E. Inputs to DC Controller ...........2-6F. Outputs from DC Controller ....2-8

This chapter outlines the machine's basic mechanisms and functions, relationshipbetween electrical and mechanical systems, and the timing of operation of respectiveparts.



Blank Page



2-1

I. BASIC OPERATIONA. Outline

The copier can be divided into four functional blocks: pick-up/feeding, exposure,image formation, and control blocks.

Figure 2-101A

Control Block

Control panel

Control circuit

Documentexposuresystem

Copyboard

Exposure Block

Image FormationBlockPrimary charg-

ing roller

Drumcleaning Developing

assembly

Photo-sensitive

drum

Pick-up tray

Pick-up/Feeding Block

Pick-upcontrolassembly

Transfer/Separation

Feeding

Fixing assembly/Delivery assembly

Copy tray

Optical path



B. Outline of Electrical CircuitThe copier’s main electrical mechanisms are controlled by the microprocessor on

the DC controller/DC power supply PCB. According to the program stored in advance,the microprocessor reads input signals from the control keys, and generates signals todrive such loads as motors, solenoids, and lamps, as necessary.

Q101

TH1

Q

Photointerrupter

Thermistor

RelayDoorswitch

High-voltagetransformer

DC load

Sub powersupply circuit

DC powersupply PCB

AC driver AC load

Developingcylinder

Primary/Transfercharging roller

Display

+DC5V+DC24V+DC5V

Scanning lampMain motorSolenoid

Heater

DC controller/DC power supply PCB

Copyboard positionsensorDelivery sensorPick-up sensor

Fixing heatertemperature sensor

Power switchControl key

Deliverydoorswitch

Mic

ropr

oces

sor

Driv

er a

ssem

bly

Driver Scanning lamp

Figure 2-101B



2-3

C. Basic Sequence of Operations (A4, 2 copies)

Figure 2-101C

SequenceCopyboard

1

2

3

4

5

6

7

8

10

STBY INTRCBRV STOP

COPYCBFW CBRV CBFW

CBRV

STOPLSTR STBY

Power switch ON

Main motor (M1)Scanning lamp (LA1-LA8)

Primary AC biasPrimary DC biasTransfer chargingCopyboard drive

solenoid (SL2)

Pick-up solenoid *Registration solenoid **

Fixing heater (H1)

Copy paper inserted (PC400/FC200)Copy Start key ON Copy paper inserted (PC400/FC200)

2 sec

9 Registration roller

*PC420/430/FC220**PC400/FC200



Table 2-101C

Period Description Remarks

STBY(Standby)

Between when the copier is switched ON and when the Copy Start key is pressed.

Between when LSTR is over and when the Copy Start key is pressed.

Waits for a press on the Copy Start key.

INTR(Initial Rotation)

For about 6 sec after STBY is over.

Executes pick-up. Removes residual charge from the photosensitive drum and stabilizes the drum sensitivity in preparation for copying operation.

The copyboard moves from the home position to the start position.

While the copyboard is moving forward (about 10 sec).

The scanning lamp illumi-nates the document, and the reflected optical image is projected to the photo-sensitive drum through the lens array.

The copy paper is moved to the transfer assembly.

While the copyboard is moving in reverse (about 4 sec).

Returns the copyboard to the start position in preparation for the next copy; if last copy, the copyboard is returned to the home position.

In continuous copying, the pick-up signal is gen-erated for pick-up operation.

COPY

CBFW(Copyboard Forward)

CBRV(Copyboard Reverse)

LSTR(Last Rotation)

After CBRV for the last copy is over until 3 sec after the copy paper has moved past the delivery sensor.

Discharges the last copy.

D. Main Motor Control Circuit1. Outline

Figure 2-101D shows the circuit that controls the main motor (M1), and the circuithas the following functions:

a. turns the main motor ON and OFF.b. controls the main motor speed (constant)

The main motor (M1) is a DC motor and is equipped with a motor rotation sensor(Q901) to serve as a clock pulse generator. Clock pulses (MMCLK) corresponding tothe revolution of the motor are generated while the motor is rotating. The speed controlcircuit controls the speed of the motor with reference to these clock pulses.

2. OperationThe drive circuit on the DC controller/DC power supply PCB causes the main motor

drive command (MMD) to go ‘0’ in response to instructions from the microprocessor,thereby causing the main motor to rotate at a specific speed.

3. Overcurrent SensorWhen the overcurrent sensor circuit detects an overload in the main motor (M1), the

speed controller circuit exerts control so that the rotation of the motor is slowed down.If the revolution of the main motor falls below a specific revolution, however, an error

associated with ‘E2’ can occur.



2-5

Overcurrent detection circuit

Q101


M1

Q901

Main motor clock pulse signal (MMCLK)

Main motor drive command (MMD)

J201-5

-4

-1

(+)

(-)

Motor rotation detection PCB

+24V

Main motor

Mic

ropr

oces

sor

(Q10

1)

Spe

ed c

ontr

ol c

ircui

t

Driv

e ci

rcui

t

Figure 2-101D



E. Inputs to DC Controller1. Inputs to DC Controller (1/2)

KEYR 2

AC power supply

Delivery door switchSW2

Door switchSW1


J104

Press on any key or densitycorrection switch allows inputof oscillation signal. (PC420/430/FC220 only)

Oscillation signal (output; PC420/430/FC220 only)

Turning density adjustment dial varies voltage. (turn to darken brings it closer to 0V)

Note: The pin No. in parentheses refers to the PC400/FC200.

PWSON

Control panel PCB

Density adjustment dial/lever

Power switch

Density correction switch (PC420/430/FC220) Oscillation signal (output)DGT 2

KEYR 3

DGT 0

DGT 1

5V

J202-1

J601-21(-16) J601-13(-8) J601-22(-17)

+5V+5V

VR601

SW604

SW605(AE)

SW603(C/S)

(bottom: lightens) (top: darkens)

SW601( ) SW602( )+

J202-2

J601-14(-10)

J202-9(-8)

J601-15

J202 -8

J601-19

J202 -4

J601-1

J202 -22

J601-2

J202 -21

J601-20(-15)

J202-3

SW6060 1 2

J103

J202-10

When ‘0’, power switch goes ON.

Figure 2-101E



2-7

2. Inputs to DC Controller (2/2)DC controller/DC power supply PCB

DGT1

KEYR0

TH1

See Chap.4.

DGTO

KEYRO

+5V

MMCLK

DGT2

KEYR0


Pick-up detection

Motor rotation detection PCB

Copyboard position detection PCB

Copyboard position detection

AE sensor/intensity sensor

Fixing heater surface temperature detection

Delivery detection

Delivery detection PCB

Control panel PCB

Q801

Q902

Q901

TH1

J801J603

-3-3

Q131

When Q902 detects copyboard start position or reversal position, oscillation signal (DGT0) is input.

When surface temperature of fixing heater increases, voltage lowers.

When Q801 detects copy paper, oscillation signal (DGT1) is input.

J603 -1

-2

J621

J905-2

-3-1

J904-2

-3

-1

J601

J601-11(-6)

J601-12(-7)

J601-15(-10)

-1-5

-2-4

Motor rotationdetection

J202-8

J202-11

J202-12

J202

J201-11

-10-12

-2

-1

-3

Oscillation signal (output)


Clock pulses corresponding to revolution of main motor are generated.


When Q131 detects copy paper, oscillation signal (DGT2) is input.

PD601PD602

Figure 2-102E



F. Outputs from DC Controller1. Outputs from DC Controller (1/2)

+24V

MMD


High voltage output

Main motor M1

Scanning lamp

Lamp PCB

J101

J102

J108-1

-2

J201-5

-4

J903-1

-2

J906-1

-2

See Chap.6.

See Chap.3.

See Chap.4.

When ‘0’, main motor goes ON.

LA1 to LA8

Fixing heater

H1

FU2Thermal fuse 2

FU1Thermal fuse 1

Figure 2-101F



2-9

2. Outputs from DC Controller (2/2)

a. PC420/430/FC220

Pick-up solenoid

SL1

J901-1

-2

J201-7

-6

+24V

PUSD When ‘0’, SL1 goes ON.

Copyboarddrivesolenoid

SL2

J902-1

-2

J101-9

-8

+24V

CBSD

(voltage to SL2 is switched between 24V and 15V to ensure stable operation)


When ‘0’, SL2 goes ON.

Figure 2-102F

b. PC400/FC200

Figure 2-103F

Registration solenoid

SL1

J901-1

-2

J201-7

-6

+24V

RGSD When ‘0’, SL1 goes ON.

Copyboarddrivesolenoid

SL2

J902-1

-2

J101-9

-8

+24V

CBSD

(voltage to SL2 is switched between 24V and 15V to ensure stable operation)


When ‘0’, SL2 goes ON.


CHAPTER 3

EXPOSURE SYSTEM

I. EXPOSURE/COPYBOARD DRIVESYSTEM ......................................3-1

A. Outline of Exposure System ...3-1B. Copyboard Drive System........3-1

II. Controlling the Scanning Lamp....3-7A. Outline ....................................3-7

B. Operations ..............................3-8C. Controlling the Intensity of the

Scanning Lamp (VR604) ........3-8III. MECHANICAL SYSTEM..............3-9

A. Scanning System..................3-10B. Copyboard Drive Assembly...3-11

This chapter outlines the machine's copyboard drive and scanning lamp controlsystems in relation to mechanisms and functions, relationship between electrical andmechanical systems, and the timing of operation of respective parts.



Blank Page



3-1

I. EXPOSURE/COPYBOARD DRIVE SYSTEMA. Outline of Exposure System

While the copyboard is moving forward, the scanning lamp (LA1 through LA8)illuminates the document, and the reflected light is projected to the photosensitive drumthrough the lens array.

Figure 3-101A

B. Copyboard Drive System1. Outline

The copyboard is moved forward or in reverse by transmitting the drive of the mainmotor (M1) to the copyboard drive gear (pinion). Figure 3-101B illustrates themovement of the copyboard.

Photosensitivedrum

Scanning lamp

Copyboard glass

Lens array

Figure 3-101B Front View

Reverse Forward Reverse Stop

Copier

Copyboard

Continuous copying

Copyboard Home Position (HP)

Copyboard Start Position (SP)

Copyboard Reversal Position

Home Position

1 2 3 4 5



Copyboard posi-tion sensor (Q902)

Forward ReverseDescription Copyboard position (cams)

Q902:ON

Forward

Q902:OFF

Q902:ON OFF

Q902:ON OFF

Reversal cam Registration camStart position cam

Copyboardposition sensorlever

Copyboard position sensor (Q902): OFF (front view)

Reverse

• Copyboard is at the home position.• Copyboard solenoid goes ON in response to a press on the Copy Start key or insertion of copy paper.

• Copyboard is at the start position.• Copyboard drive solenoid goes OFF.• Scanning lamp ON.

• The copyboard drive solenoid goes ON about 0.5 second after the Copy Start key is pressed.• AE measurement starts.• Registration roller goes ON (by registration cam).

• Copyboard is at the reversal position.• Copyboard drive solenoid goes OFF.• After a specific period, copyboard drive solenoid goes ON.• Pick-up solenoid goes ON (continuous copying).• Scanning lamp OFF.

• For the last copy, the copy board drive solenoid goes OFF at the copyboard home position.

Con

tinuo

us c

opyi

ng

Table 3-101B



3-3

2. Controlling the Copyboard DriveThe copyboard is controlled for forward, reverse, and stop operations by the

copyboard drive solenoid (SL2) and forward/ reverse switching mechanism.A photosensor (Q902) is provided on the copyboard drive assembly to monitor the

position of the copyboard; as the copyboard moves, the cam found under the copyboardpushes the copyboard sensor lever to turn the photosensor ON or OFF.

‘E2’ is displayed if the copyboard fails to complete its movement within a specificperiod of time.

In response to the signal from Q902, the DC controller controls the timing for papertransport and the movement (forward, reverse, stop) of the copyboard; see Table 3-101B.

Copyboard drive solenoid drive command (CBSD)

Copyboard drive gear

Reversal cam

Start position cam

Forward

Copyboard glass

Registration cam

Rack

Copyboard position sensor lever

Copyboard position sensorQ902

J201-10

J201-9

J201-4

Cop

yboa

rd p

ositi

on s

enso

r si

gnal

Main motor drive command (MMD)

Copyboard drivesolenoid

SL2

Forwardgear

Forward/Reverseswitching mechanism

M1 Main motor

Reversegear

DC controller/DC powersupply PCB

Figure 3-102B Front View

Note:i. The direction (forward/reverse) is switched when the copyboard drive solenoid

is OFF.ii. The direction of the drive is maintained while the copyboard drive solenoid is

ON.

Table 3-102B



3. Mechanism of Copyboard Drive AssemblyThe forward gear and reverse gear are rotating in the direction of the arrow (Figure

103B) while the main motor (M1) is operating.The forward/reverse switching mechanism engages with either the forward gear or

the reverse gear depending on the orientation of the copyboard position sensor leverand the state (ON/OFF) of the copyboard drive solenoid (SL2) operated by the startposition cam or reversal cam; when not engaged, the mechanism is said to be free, andthe copyboard can be moved by hand.

The above mechanism is used to move the copyboard forward and reverse or tostop it.

Copyboard (rack)

Forward

Start position cam

Copyboard position lever

Copyboard drive gear (pinion)

Forward gear

Main motor gear

M1Copyboard drivesolenoid (SL2)

Reversing cam

Reverse

Reversing gear

Forward/Reverse switching mechanism

Main motor

Figure 3-103B

Copyboard positionsensor lever

Down Up

forward reverse

stop (free)

ON

OFF

Copyboard drive solenoid (SL2)



3-5

a. Stopping the CopyboardCausing the copyboard drive solenoid (SL2) to go OFF frees both forward and

reverse gears so that the copyboard remains stationary.At the time, the copyboard may be moved to the right or left by hand.

b. Moving the Copyboard in ReverseWhen SL2 goes ON while the main motor is operating, the forward/reverse

switching mechanism engages with the reverse gear, and the reverse gear rotates inthe direction of the arrow, causing the copyboard to move in reverse.

The copyboard moves in reverse about two times as fast as when it moves forwardowing to the difference in the gear ratio.

Figure 3-104B

Copyboarddrive gear

Reversing gear

Forward/Reverse switchingmechanism


M1Reverse

Main motor



c. Moving the Copyboard ForwardWhen the copyboard has moved in reverse and is positioned as shown in Figure 3-

105B, the start position cam pushes down the copyboard position sensor lever. WhenSL2 goes ON in this position, the forward/reverse switching mechanism moves to theposition shown in the figure, causing the forward/reverse switching mechanism toengage with the forward gear; as a result, the forward gear rotates in the direction of thearrow, moving the copyboard forward.

Copyboard drive gear

Forward gear

Start positioncam

M1


Forward/Reversalswitchingmechanism

Forward

Main motor

Figure 3-105B



3-7

II. Controlling the Scanning LampA. Outline

Figure 3-201A shows the circuit that controls the scanning lamp (fuse lamp), and thecircuit has the following functions:

• Turns the scanning lamp ON and OFF.• Controls the intensity of the scanning lamp.

An intensity sensor (PD601) is provided to ensure that the original will be illuminatedafter the intensity of the scanning lamp has stabilized.

The intensity of the scanning lamp is checked by the lamp intensity detection signal(LID) to make sure that the intensity has reached the specified value.

In addition, a rush current protection circuit is provided to prevent rush currentoccurring when the lamp turns on.

FIgure 3-201A

Scanning lamp (LA1-LA8)

J621-4

-3(-1)

+

-

+

-

Intensity sensor(PD601)

VR604

5V

Control panel PCB

Amplifier circuit

J601-10(-5)

J108-2

+24VU

Q143Lamp driver circuit

Rush current protection circuit

Lamp ON signal (LAPWM)

Lamp intensity sensor signal (LID)

The number within parentheses represents the PC400/FC200.

J202 -13


Mic

ropr

oces

sor

J108-1

B. Operations1. Turning the Scanning Lamp ON and OFF

• Square waves of the LAPWM command corresponding to the output of the amplifier circuit are generated to the lamp driver circuit. (Q143 ON)

Current flows into the filament of the lamp, causing the fluorescent lamp to goON at high frequency.

2. Controlling the Intensity of the Scanning Lamp• If the intensity of the lamp is low when the lamp goes ON,

Initial power of the intensity sensor PD601 is low.

Output voltage of the amplifier circuit is high.

Duty ratio (H) of the output of the microprocessor (LAPWM command) grows high.

Current flowing to the lamp increases.

• If the intensity of the lamp is high when the lamp goes ON,

Initial power of the intensity sensor PD601 is high.

Output voltage of the amplifier circuit is low.

Duty ratio (H) of the output of the microprocessor (LAPWM command) grows low.

Current flowing to the lamp decreases.

• If the microprocessor finds out that the scanning lamp has remained on for 2 minat such times as not prescribed, it activates the self diagnostic mechanism; theresults are indicated by ‘E6’ for the PC420/430/FC220 and ‘JAM’ for thePC400/FC200.

C. Controlling the Intensity of the Scanning Lamp (VR604)You must adjust the intensity of the lamp if you have replaced the scanning lampunit, intensity sensor or control panel PCB; see p.10-6.

Note:You must adjust the AE mechanism after adjusting the intensity.(PC420/430/FC220)





3-9

III.MECHANICAL SYSTEMHere, the copier is discussed in terms of its mechanical characteristics and

operation and how to disassemble and assemble it.Be sure to observe the following for disassembly/assembly work:

1. Disconnect the power cord for safety before disassembly or reassemblywork.

2. Unless otherwise noted, reassembly is the reverse of disassembly.3. Group the screws by type (length and diameter) and location.4. One of the mounting screws used on the rear cover is provided with a washer to

protect against static electricity. Be sure to keep the washer with the screw whenmounting the cover.

5. The fixing screw for the grounding wire and varistors is fitted with a washer toensure electric continuity; be sure to use the washer for reassembly.

6. If possible, avoid operating the machine with any of its parts removed.

!

Caution:The scanning lamp is adjusted atthe factory with high precision toensure the best intensity of light; ifnecessary, replace it as part of thescanning lamp unit; see Figure 3-302A.



A. Scanning System1. Detaching the Scanning Lamp Unit1) Detach the top cover assembly.2) Disengage the two hooks q and pins

w, and detach the lamp unit e.

disengage

➀

➁ ➁

Figure 3-301A

Figure 3-302A

Scanning lamp unit

Note:Take extra care not to damage theteeth of the gear when lifting thecopyboard drive assembly.



3-11

B. Copyboard Drive Assembly

1. Detaching the Copyboard DriveAssembly

1) Take out the fixing assembly.2) Remove the screw and remove the

grounding wire q; remove the screw,and remove the motor rotationdetecting PCB w; then, disconnectthe four connectors e.

➀

➁

➂

➂

3) Remove the screw r, and detachthe cartridge support t.

(rear)

➃

➄

Figure 3-301B (rear view)

Figure 3-302B



4) Remove the four screws (t, M4X8,yellow; y, M3X6, white), and detachthe copyboard drive assembly u asif to lift it.

Figure 3-303B

➄

➄

➅➆


CHAPTER 4

IMAGE FORMATION SYSTEM

I. PROCESS DESCRIPTION..........4-1A. Outline ....................................4-1B. Sequence of Image Formation

Operations (A4, 2 copies) .......4-2C. Primary Charging Control Circuit

................................................4-3D. Controlling Developing Bias....4-6E. Transfer Charging Control Circuit

..............................................4-10

F. Document Density Measurement(AE; PC420/430/FC220).......4-14

II. CHARGING, DEVELOPING, ANDCLEANING SYSTEMS ..............4-17

A. Cartridge ...............................4-17III. MECHANICAL SYSTEM............4-18

A. Photosensitive Drum.............4-19B. Transfer Charging Roller.......4-20

This chapter outlines the machine's image formation system in relation tomechanisms and functions, relationship between electrical and mechanical systems,andthe timing of operation of respective parts.


CHPTER 4 IMAGE FORMATION SYSTEM

Blank Page



4-1

I. PROCESS DESCRIPTIONA. Outline

The copier’s image formation system has the following functions:

• Controls the scanning lamp.• Controls the primary charging.• Controls the transfer charging.• Controls the developing bias.

Figure 4-101A

Lamp intensity sensor

AE sensor

Scanninglamp

Primarychargingroller

Lensarray

Developingcylinder

Transferchargingroller

Control panelPCB

Lam

p in

tens

ity s

enso

rsi

gnal

(LI

D)

AE

sig

nal (

AE

)

Lam

p O

N c

omm

and

(LA

PW

M)

Prim

ary

coro

na h

igh

volta

ge

Tran

sfer

cha

rgin

g hi

gh v

olta

ge

Dev

elop

ing

bias


J621-4 -2

J601-10 -4

-19J202-13

Sta

tic e

limin

ator

Note : The AE sensor is provided for the PC420/430/FC220 only.

Photosensitivedrum



B. Sequence of Image Formation Operations (A4, 2 copies)

Figure 4-401B

SequenceCopyboard

1

2

3

4

5

6

7

STBY INTRCBRVSTOP

COPYCBFW CBRV CBFW

CBRV

STOPLSTR STBY

Power switch ON

Main motor(M1)

Scanning lamp(LA1-LA8)

Primary AC bias

Primary DC bias

Transfer charging

Developing AC bias

Copy paper inserted (PC400/FC200)Copy Start key ON Copy paper inserted (PC400/FC200)

4 sec 1.5 sec

: ONScanning lamp

Primary DC bias

Developing DC bias

Transfer charging

Developing DC bias

: -230V

: -625V

: -400V

: -120V to -560V (variable according to density control dial/ lever, AE)

: Cleaning mode

: Measurement mode

: Transfer



4-3

C. Primary Charging Control Circuit1. Outline

Figure 4-101C shows the circuit that controls the primary charging, and the circuithas the following functions:

• Turns the DC bias ON and OFF.• Turns the AC bias ON and OFF.• Controls the DC bias voltage

(constant).• Controls the AC bias current

(constant).

A DC bias (-625 V/-230 V) and an AC bias are applied to the primary charging rollerto maintain the surface potential of the photosensitive drum uniform.

During document exposure (-625 V) and non-exposure periods (-230 V) DC bias isswitched by the DC bias high output command (HVPHO).

The DC bias and AC bias are turned ON and OFF by the DC bias ON command(HVPDC) and AC bias ON command (HVPAC), respectively.

Reference:Unless the document is being illuminated, the DC bias is switched to -230V toprevent adhesion of toner on the photosensitive drum.



2. Operationsa. HVPDC=1, HVPHO=1 (copying)

DC bias control circuit set to ‘-625 V’.

Transformer T106 generates ‘DC bias’.

HVPAC=1

Oscillation control circuit goes ON.

Transformer T103 generates AC bias

Primary charging(DC bias + AC bias) goes ON.

b. HVPDC=1, HVPHO=0 (document not exposed)

DC bias control circuit set to ‘-240 V’.

Transformer T106 generates DC bias.

HVPAC=1

Oscillation control circuit goes ON.

Transformer T103 generates AC bias.

Primary charging(DC bias + AC bias) goes ON.

c. HVPDC=0, HVPHO=0 (standby)

DC bias control circuit goes OFF.

Transformer T106 DC bias goes OFF.

HVPAC=0

Oscillation control circuit goes OFF.

Transformer T103 goes OFF.

Primary charging(DC bias + AC bias) goes OFF.



4-5

Primarychargingroller

Photo-sensitivedrum

Amplifier

Microprocessor

DC biascontrol circuit

Transformer(T103)Transformer

(T106)

DC

cur

rent

det

ectio

nD

C b

ias

high

out

put

com

man

d (H

VP

HO

)

DC

bia

s O

N c

omm

and

(HV

PD

C)

AC

bia

s O

N c

omm

and

(HV

PA

C)

Cur

rent

det

ectio

n

J6


Oscillationcontrol circuitOscillationcircuit

Figure 4-101C



Density Control Lever

9 5 1(darker) (lighter)0

-100

-200

-300

-400

-500

Developing bias DC component (V)

Figure 4-101DManual Density Control (PC400/FC200)

D. Controlling Developing Bias1. Outline

Both AC bias and DC bias are applied to the developing cylinder during copyingoperation.

When the photosensitive drum is rotating except during development, about -400 Vis applied to the developing cylinder regardless of the settings made by the density control dial/lever, thereby preventing adhesion of excess toner on the surface of the photosensitive drum.

The copier controls the copy density by varying the voltage of the DC component ofthe developing bias (-120 to -560 V) based on the following:

• Setting made by the density control dial/lever (manual density control).• Output of the AE sensor (automatic density control; PC420/430/FC220).• Setting made by the density correction switch (SW606; PC420/430/FC220).

The density correction switch (SW606) on the control panel PCB allows three settings by the user. Advise the user to change the setting if the copies tend to be foggybecause of shifts in the sensitivity of the photosensitive drum. SW606 is valid for manual density control as well.

Figure 4-101D,102D shows the changes in the DC component of the developingbias caused by the density control dial/lever in manual density control mode; Figure 4-103D, on the other hand, shows changes in the DC component of the developing biascaused by different document densities in automatic density adjustment mode (AE).

Note:The copier does not change the developing bias between black toner and colortoner. This is because the color toner used by the copier is a single-componentagent, which allows the use of the same developing bias as for the black toner fordevelopment.



4-7

Figure 4-102DManual Density Control (PC420/430/FC220)

Density Control Dial

9 5 1(darker) (lighter)0

-100

-200

-300

-400

-500


ME2 (dark)ME1ME0 (light)Setting by density correction switch (SW606)

Figure 4-103DAutomatic Density Control (PC420/430/FC220)

Test Chart NewspaperDocument density

0

-100

-200

-300

-400

-500


AE2 (dark)

AE1

AE0 (light)

(SW606)



2. OperationsFigure 4-104D shows the circuit that controls the developing bias, and the circuit

has the following functions:• Turns the developing bias AC component ON and OFF.• Turns the developing bias DC component ON and OFF.• Controls the voltage level of the DC bias according to the settings made by the

copy density dial/lever.

a. Turning the Developing Bias AC Component ON and OFF• ACBTP=0 (pulse output OFF)

T104 goes OFF.The above condition deprives the developing cylinder of the AC bias.

• ACBTP=1 (pulse output ON)

T104 goes ON.The above condition raises the AC bias output using the high-voltage transformer

(T104) and sends it to the developing cylinder.

b. Turning the DC Bias ON and OFF and Controlling the Voltage LevelThe DC bias is turned ON and OFF by the DC bias control command (DCBPWM).The microprocessor checks the DC voltage when the DC bias is ON so as to keep it

to the specified voltage.

a) DCBPWM=0 (DC bias OFF)

Q146 goes ON.

DC bias goes OFF.

b) DCBPWM=1 (DC bias ON)

Q146 goes OFF.

DC bias goes ON.

The voltage level of the DC bias is controlled by varying the pulse width of the DCbias control command (DCBPWM).

While the photosensitive drum is rotating except during development, about -400 Vis applied to the developing cylinder.



4-9

Figure 4-104D

Photo-sensitive

drum

Amplifier

Microprocessor

Transformer(T104)Transformer

(T106)D

C v

olta

ge d

etec

tion

AC

bia

s tim

ing

puls

e co

mm

and

(AC

BT

P)

J7


5V

Q146Developingcylinder

DC

bia

s co

ntro

l com

man

d(D

CB

PW

M)

AE

VR601

SW606

AE signal

Densitycontrol dial

Densitycorrectionswitch

Control panelPCB

J202



E. Transfer Charging Control Circuit1. Outline

Figure 4-101E shows the circuit that controls transfer charging, and the circuit hasthe following functions:

• Controls the constant current in measurement mode.• Controls the constant voltage of the DC bias.• Switches the polarities of the DC bias (cleaning mode).

The internal resistance of the transfer corona roller tends to vary from one roller toanother or because of changes in the environment.

The copier sends constant current to the transfer charging roller so that themicroprocessor can check the changes in terms of voltage (measurement mode).

Based on the measured voltage, the microprocessor corrects the DC bias.Further, the copier is equipped with a cleaning mechanism (cleaning mode) that

prevents adhesion of toner to the transfer charging roller.In cleaning mode while the drum is rotating, except during transfer, a DC bias is

applied to the transfer charging roller with a reversed polarity, thereby returning thetoner to the photosensitive drum.

Measurement mode

Transfer(negative DC bias)

Cleaning mode(positive DC bias)



4-11

2. Operationsa. Operations in Measurement Mode

HVTDC=1, DCTPWM=0

Oscillation circuit goes ON.Constant current control circuit generates ‘ON’.

Measurement mode is selected,applying a constant current tothe transfer charging roller.

TREV=1

Positive bias control circuit goes OFF.

High-voltage transformer/rectifiercircuit goes OFF.

In measurement mode, the current is monitored by the current sensor circuit so thatthe constant current control circuit can control it to a constant current.

Further, the microprocessor monitors the internal resistance of the transfer chargingroller in terms of voltage using the auxiliary winding of the transformer (T107).

b. Operations during CopyingHVTDC=1, DCTPWM=1

Oscillation circuit goes ON.Pulse/DC converter circuit goes ON.

Voltage control circuit goes ON.

High-voltage transformer (T107)goes ON to apply a negative DCbias to the transfer charging roller.

TREV=1

Positive bias control circuit goes OFF.

Multiplier/rectifiercircuit goes OFF.



The microprocessor varies the pulse width of the transfer DC bias control command(DCTPWM) according to the internal resistance of the transfer charging roller affectedby the surrounding environment, thereby controlling the negative DC bias.

If an overcurrent occurs in the output side of the transformer (T107) because ofchanges in the environment, the current limiter circuit exerts control so that no currentlarger than the specified value will flow.

c. Operations in Cleaning Mode

TREV=0

Positive bias control circuit goes ON.

Multiplier/rectifier circuit goes ON.

Cleaning mode is selected, apply-ing a positive DC bias to the transfer charging roller.

HVTDC=0, DCTPWM=0

Oscillation circuit goes OFF.Pulse/DC converter circuit goes OFF.



4-13

Figure 4-101E

Oscillationcircuit

Voltagecontrolcircuit

Positivebiascontrolcircuit

Multiplier/Rectifier circuit

Constant currentcontrol circuit

Pulse/DCconvertercircuit

Currentsensorcircuit

Currentlimitercircuit

Microprocessor

Photo-sensitive

drumTransferchargingroller

Transformer(T106)

Transformer (T107)


Tran

sfer

pos

itive

DC

bia

s O

N c

omm

and

(TR

EV

)

Vol

tage

sen

sor

(ana

log

sign

al)

Tran

sfer

DC

bia

s O

N c

omm

and

(HV

TD

C)

Tran

sfer

DC

bia

s co

ntro

lco

mm

and

(DC

TPW

M)

24V



F. Document Density Measurement (AE; PC420/430/FC220)1. Outline

The copier is equipped with an automatic density control (AE) mechanism thatcontrols the DC component of the developing bias. The copier’s AE mechanism doesnot execute an AE scan, but instead measures the document density during imageexposure.2. Operations

Document measurement is started while the copyboard is moving forward; i.e.,when the leading edge of the document begins to be exposed (copyboard positionsensor Q902 goes OFF).

At the time, the photodiode (PD602) checks the reflected light.The output of the photodiode (PD602) is amplified, and sent to the microprocessor

as AE signals.

<AE Measurement Timing Chart>

Figure 4-101F

SequenceCopyboard

1

2

3

4

STBY INTRCBRV STOP

COPYCBFW

Power switch ON

Main motor (M1)Copyboard position sensor (Q902)

AE measurementDeveloping DC bias

Copy Start key ON



4-15

Figure 4-102F

3. Adjusting the AE Mechanism (VR602, VR603)You must adjust the AE mechanism if you have replaced the scanning lamp unit,

control panel PCB, or intensity/AE sensor; see p.10-8.

Note:Adjust the AE mechanism only after adjusting the intensity of the scanning lamp.

30 mm (approx.)33.5 mm (approx.)

6 mm

: Points of measurement

The microprocessor takes measurements of the AE signals four times every 1.5mm, and generates the developing DC bias control command (DCBPWM) to suit theaverage document density. See Figure 4-102F for the points at which the documentdensity is measured in relation to the copyboard glass.



Figure 4-103F

5V

|

Photosensitive drum

Developingcylinder

Microprocessor

Amplifier circuit

Scanning lamp

Lens arrayAE sensorPD602

VR603

4V (approx.)

VR602

Control panel PCB

AE signalJ601 -4

J202 -19

DCBPWMDC biascontrolcircuit


Forward

|J621 -1

J621 -2



4-17

II. CHARGING, DEVELOPING, AND CLEANING

II. SYSTEMSA. Cartridge1. Outline

The copier is a cartridge type, in that its photosensitive drum, primary chargingroller, developing assembly, and cleaner are designed as a single entity.

Cleaning blade

Drum cover shutter Developing cylinder

Light-blocking shutterPrimary charging roller

Developing blade

Photosensitivedrum

Figure 4-201A

a. Drum Cover ShutterThe photosensitive drum is susceptible to light; if exposed to strong light, it will

develop residual memory, causing white spots or black lines on the copies. To avoidsuch problems, you must not open the drum cover shutter unless it is absolutelynecessary. The drum cover shutter is designed to open when the cartridge is insertedinto the copier and the copier’s top unit is closed.

b. Light-Blocking ShutterThe absence of a cartridge inside the copier allows light to enter the inside of the

copier from the opening created for exposure. The light-blocking shutter is provided toprotect the photosensitive drum against intrusion of such light.



III.MECHANICAL SYSTEM

Here, the copier is discussed in terms of its mechanical characteristics andoperation and how to disassemble and assemble it.

Be sure to observe the following for disassembly/assembly work:






!



4-19

A. Photosensitive Drum1. Cleaning the Drum

Caution:As a rule, do not touch or clean the photosensitive drum.

1) Open the top cover, and take out the cartridge.2) Put the cartridge upside down, and open the drum shutter.3) Clean the surface of the drum using a flannel cloth coated with toner.

Caution:1. You must rotate the drum in the direction it rotates for making copies;

otherwise, the leaf spring used to apply developing biases to the developingcylinder may cause faulty contact.

2. Use a flannel cloth; do not use paper, lint-free or otherwise.3. Work quickly to protect the drum from light.

Reference:The drum would recover to more or less its normal condition if left alone for fiveminutes in a dark place after exposure to an intensity of 1500 lux (about 5 minutesunder general lighting). However, you must try to avoid any exposure at all cost.(The rays of the sun have intensities ranging between about 10000 and 30000 lux.)



Figure 4-301B

➀

➀

➁

Figure 4-302B

Spring

Boss

Hook Hook

B. Transfer Charging Roller1. Cleaning the Transfer Charging

Roller1) Open the top cover, and take out the

cartridge.2) Wipe off the dirt from the transfer

charging roller lightly using lint-freepaper.

Caution:1. Do not use water or solvent.2. Do not touch the roller; make

sure the roller is free of solventor oil.

2. Detaching the Transfer ChargingRoller

1) Open the top cover, and take out thecartridge.

2) Free the tabs q of the base plate,and take out the transfer chargingroller w by pulling it up together withits bushings; at this time, remove thespring as well.

Caution:Make sure that the spring is fittedover the boss in the center of thehook when attaching the transfercharging roller; see Figure 4-302B.


CHAPTER 5

PICK-UP/FEEDING SYSTEM

I. OUTLINE .....................................5-1II. CONTROLLING THE PICK-UP

ROLLER.......................................5-2A. PC420/430/FC220 ..................5-2B. PC400/FC200 .........................5-3

III. CONTROLLING THEREGISTRATION ROLLER...........5-4

A. Outline ....................................5-4B. Pick-Up/Feeding Timing Chart

(A4, 2 copies)..........................5-5IV. CHECKING FOR JAMS...............5-6

A. Delivery Delay Jam.................5-6B. Delivery Stationary Jam..........5-7

C. Pick-Up Delay Jam(PC420/430/FC220)................5-8

D. Pick-Up Stationary Jam ..........5-9E. Paper is present at the pick-up or

delivery sensor at time of power-on or when the Copy Start key ispressed. ..................................5-9

V. MECHANICAL SYSTEM............5-10A. Pick-Up Roller Assembly.......5-11B. Registration Roller Assembly

..............................................5-14C. Removing the Separation Pad

..............................................5-15

This chapter outlines the machine's pick-up/feeding system in relation tomechanisms and functions, relationship between electrical and mechanical systems,and the timing of operation of respective parts.



Blank Page



5-1

I. OUTLINEThe pick-up roller starts to rotate when the Copy Start key is pressed in the case of

the PC420/430/FC220 and when paper is inserted, i.e., in response to the activation ofthe pick-up sensor (Q131), in the case of the PC400/FC200.

The copy paper is controlled by the registration roller so that its leading edgematches that of the image on the photosensitive drum; the paper is then moved to thetransfer, separation, and fixing assemblies before it reaches the copy tray.

The delivery of copy paper is monitored by the delivery sensor (Q801); if copy paperfails to reach or move past the sensor, the copier identifies the condition as a jam andflashes ‘Jam’ on the control panel.

Figure 5-101

Reg

istr

atio

n so

leno

id d

rive

com

man

d (R

GS

D)

Pic

k-up

sen

sor

sign

al

M1

M1


ControlpanelPCB

Pick-upsolenoid

SL1

SL1

Main motor

Deliverysensor(Q801)

Fixingassembly

Photo-sensitivedrum

Pick-up sensor(Q131)

Registrationroller

Pick-up clutch*

Pick-uproller

Registration clutch*

Pick-uproller

Main motor

Registrationsolenoid

Registration roller

Pick-up sensor (Q131)

(PC400/FC200)

*Spring clutch

Mai

n m

otor

driv

eco

mm

and

(MM

D)

Pic

k-up

sol

enoi

d dr

ive

com

man

d (P

US

D)

Del

iver

y se

nsor

sign

al

Pic

k-up

sen

sor

sign

al

Registration clutch*



II. CONTROLLING THE PICK-UP ROLLERA. PC420/430/FC220

The pick-up roller is controlled by a spring clutch, control ring, and pick-up solenoid(SL1).

When the pick-up solenoid goes ON, the claw moves away from the control ring,allowing the drive from the main motor (M1) to be transmitted, causing the pick-up rollerto make a single rotation.

At the time, copy paper is picked up and butted against the registration roller,forming an arch.

Claw

Pick-up solenoid (SL1)

Spring clutch

Control ring

M1

Main motor

Pick-up roller

Pick-up direction

Copy paper

Figure 5-201A



5-3

B. PC400/FC200When the pick-up sensor (Q131) detects copy paper, the main motor (M1) goes ON,

causing the pick-up roller to rotate by its drive.The pick-up roller keeps rotating as long as the main motor remains ON.The condition causes the copy paper to butt against the registration roller.


Sensor lever


Pick-up rollers

Pick-up direction

Copy paper

Main motorM1

Mai

n m

otor

driv

e co

mm

and

(MM

D)

Pic

k-up

sen

sor

osci

llatio

n si

gnal

FIgure 5-201B



III. CONTROLLING THE REGISTRATION ROLLERA. Outline

The registration roller rotates when the registration cam found under the copyboardglass pushes the lever* while the copyboard is moving forward; see Table 3-2 andFigure 3-28.

* Frees the claw that holds the control ring.The registration roller stops when the pick-up solenoid (PC420/430/FC220) or the

registration solenoid (PC400/FC200) goes ON to set the claw to the control ring.

Copyboard glass

Registration cam

Lever

Main motor M1

ClawControl ring

Copy paper

Upper registration roller

Pick-up direction

Pick-up solenoid (SL1; PC420/430/FC220)Registration solenoid (SL1; PC400/FC200)

Lower registration rollers

Lower registration rollers


when registration roller is ON

when registration roller is OFF

Mai

n m

otor

driv

e co

mm

nand

(M

MD

)

Pic

k-up

/reg

istr

atio

n so

leno

id d

rive

com

mna

nd (

PU

SD

/RG

SD

)

:

:

Pick-up sensor(Q131; PC420/430/FC220)

Pic

k-up

sen

sor

sign

al

Figure 5-301A



5-5

B. Pick-Up/Feeding Timing Chart (A4, 2 copies)a. PC420/430/FC220

SequenceCopyboard

1

2

3

4

5

6

STBY INTRCBRV STOP

COPYCBFW CBRV CBFW

CBRV

STOPLSTR STBY

Power switch ON

Main motor (M1)Copyboard position

sensor (Q902)


Fixing heater (H1)Pick-upsolenoid (SL1)

Copy Start key ON


: ON, only PC430.

Figure 5-301B

b. PC400/FC200

SequenceCopyboard

1

2

3

4

5

6

STBY INTRCBRV STOP

COPYCBFW CBRV CBFW

CBRV

STOPLSTR STBY

Power switch

Main motor (M1)Copyboard position

sensor (Q902)


Fixing heater (H1)Registration solenoid (SL1)

Copy paper inserted*


Copy paper inserted*

*Pick-up sensor (Q131) detects copy paper.

Figure 5-302B



IV. CHECKING FOR JAMSThe copier has a pick-up sensor (Q131) and a delivery sensor (Q801) to check if the

paper is moving properly inside it.Jams are identified by the presence of paper in the pick-up or delivery assembly at

such times as preprogrammed in the microprocessor.When the microprocessor identifies a jam, it immediately causes the main motor to

go OFF and indicates the presence of a jam.The microprocessor identifies the following conditions as jams.

A. Delivery Delay JamThe copy paper does not reach the delivery sensor within a specific period of time.

1. PC420/430/FC220

SequenceCopyboard

1

2

3

4

5

STBY INTRCBRV STOP

COPYCBFW CBRV CBFW

CBRV

STOPLSTR STBY

Power switch ON

Main motor(M1)

Copyboard posi-

tion sensor (Q902)

Jam check

Copy Start key ON


Delivery sensor (Q801)

8 sec 8 sec

errornormal

SequenceCopyboard

1

2

3

4

5

STBY INTRCBRVSTOP

COPYCBFW CBRV CBFW

CBRV

STOPLSTR STBY

Power switch ON

Main motor (M1)Copyboard posi-

tion sensor (Q902)

Jam check

Copy paper inserted



8 sec 8 sec

errornormal

Copy paper inserted

Figure 5-401A (A4)

2. PC400/FC200

Figure 5-402A (A4)



5-7

B. Delivery Stationary JamThe copy paper does not move past the delivery sensor within a specific period of

time.

1. PC420/430/FC220

SequenceCopyboard

1

2

3

4

5

STBY INTRCBRV STOP

COPYCBFW CBRV CBFW

CBRV

STOPLSTR STBY

Power switch ON


tion sensor (Q902)

Jam check

Copy Start key ON

Pick-up sensor(Q131)


4 sec

errornormal

4 sec

normal

6.5 sec

SequenceCopyboard

1

2

3

4

5

STBY INTRCBRVSTOP

COPYCBFW CBRV CBFW

CBRV

STOPLSTR STBY

Power switch ON


tion sensor (Q902)

Jam check

Copy paper inserted



4 sec

errornormal

4 sec

normal

6.5 sec

Copy paper inserted

Figure 5-401B (A4)

2. PC400/FC200

Figure 5-402B (A4)



C. Pick-Up Delay Jam (PC420/430/FC220)The copy paper does not reach the pick-up sensor within a specific period of time.

SequenceCopyboard

1

2

3

4

5

6

STBY INTRCBRV STOP

COPYCBFW CBRV CBFW

CBRV

STOPLSTR STBY

Power switch ON


tion sensor (Q902)


Copy Start key ON



Jam check

Note: A jam is identified if the pick-up sensor is ON 0.2 sec after the pick-up solenoid has gone OFF.

normal

3.3 sec

error

3.3 sec

3 sec

Figure 5-401C



5-9

D. Pick-Up Stationary JamThe copy paper does not move past the pick-up sensor within a specific period of

time.

1. PC420/430/FC220

SequenceCopyboard

1

2

3

4

5

STBY INTRCBRV STOP

COPYCBFW CBRV CBFW

CBRV

STOPLSTR STBY

Power switch ON


tion sensor (Q902)

Jam check

Copy Start key ON



1 sec

errornormal

1 sec

SequenceCopyboard

1

2

3

4

5

STBY INTRCBRVSTOP

COPYCBFW CBRV CBFW

CBRV

STOPLSTR STBY

Power switch ON


tion sensor (Q902)

Jam check

Copy paper inserted



10 sec

errornormal

Copy paper inserted

10 sec

Figure 5-401D (A4)

2. PC400/FC200

Figure 5-402D (A4)

E. Paper is present at the pick-up or delivery sensor at time of

power-on or when the Copy Start key is pressed.



V. MECHANICAL SYSTEM

Here, the copier is discussed in terms of its mechanical characteristics andoperation and how to disassemble and assemble it.







!



5-11

A.Pick-Up Roller Assembly1. Detaching the Pick-Up Rollera. PC420/430/FC220

1) Detach the body cover.2) Disengage the hook q, and detach

the solenoid w.

Figure 5-501A (right rear view)

Figure 5-502A

3) Remove the spring e, and detachthe claw r of the control ring bypulling it up.

➀ ➁

➂

➃



4) Bend the holding plate t, anddetach the pick-up roller bushing yby pulling it to the front.

Figure 5-503A

5) Move the pick-up roller assembly uto the front, and detach it from therear.

➄➅

➆

➇

9

10

Figure 5-504A

6) Disengage the hook i, and detachthe pick-up roller !0 from the pick-uproller shaft o.

Figure 5-505A



5-13

b. PC400/FC2001) Detach the body cover.2) Bend the pick-up roller support q,

and detach the pick-up roller w fromthe rear by pulling it to the front.

A B➀

➁

Figure 5-506A

Note:When installing the registrationroller assembly to the copier, besure that the sheet shown in Figure5-502B is between the upper andlower registration rollers.



B. Registration RollerAssembly

1. Detaching the Registration RollerAssembly

1) Detach the copyboard driveassembly.

2) Remove the two screws (M4X10;black) q, and detach the registrationroller assembly w while lifting itsfront slightly and as if to move it tothe front.

Figure 5-501B

Figure 5-502B

➀

➀

➁

Sheet Registration roller (lower)



5-15

C. Removing the Separation Pad

1) Remove the pick-up roller assembly

q.

q

Push

Push

➁

➂

Figure 5-501C

Figure 5-502C

2) Open up the feeding guide w, andremove the separation guide e.



5-16


CHAPTER 6

FIXING SYSTEM

I. OUTLINE OF OPERATIONS .......6-1A. Outline ....................................6-1B. Controlling the Fixing Heater

Temperature............................6-3

C. Controlling the Supply Power tothe Fixing Heater ....................6-3

D. Protection Mechanisms ..........6-5II. MECHANICAL SYSTEM..............6-6

A. Fixing Assembly......................6-7

This chapter outlines the machine's fixing system in relation to mechanisms andfunctions, relationship between electrical and mechanical systems, and the timing ofoperation of respective parts.



Blank Page



6-1

I. OUTLINE OF OPERATIONSA. Outline

The pressure roller in the fixing assembly is driven by the main motor (M1).The rotation of the pressure roller causes the fixing film to rotate.Some sections of the underside of the fixing film is heated by the fixing heater.The temperature of the fixing heater is monitored by the thermistor (TH1), and the

readings are sent to the microprocessor on the DC controller/DC power supply circuit inthe form of the fixing heater temperature sensor signal (TH1).

Based on the signal, the microprocessor of the DC controller/DC power supplycircuit controls the temperature of the fixing heater by the fixing heater drive command(HTRD).



Figure 6-101A

RelayRL101

NO

COM

5V

5V

Relay drive command(RELAYD)

Fixing heateroverheatingsensor circuit

5V

5V5V

5V

Fixing heaterdrive command

(HTRD)


Mic

ropr

oces

sor

Thermistor signal 1 (TH1)

Fixing heatertemperaturesensor

Thermal fuse(228°C) FU2

Fixing heaterH1

TH

1-

-+

+

Delivery rollerPressure roller

Fixing heater

Fixing film

Main motorM1

Figure 6-102A



6-3

B. Controlling the Fixing Heater TemperatureThe target temperature for the fixing heater is controlled to four settings (155°, 165°,

175°, 185°C) by the microprocessor based on the following conditions:

a. Temperature of the fixing heater at time of power-on (185°C if 90°C or less; 165°C ifotherwise)

b. Temperature of the fixing heater at time of copy-start (185°C if 90°C or less; asneeded to suit the number of copies made if otherwise)

c. Number of copies made:185°C if copy175°C if for 2 to 4 copies165°C if for 5 to 15 copies185°C if for 16 copies or more

C. Controlling the Supply Power to the Fixing HeaterThe temperature of the fixing heater (H1) is controlled by controlling the power

supplied to the fixing heater.The power to the fixing heater is controlled by a phase power control method.The microprocessor on the DC controller/DC power supply circuit takes on the zero-

cross signal (ZXDP) from the zero-cross signal generator circuit as a sync signal toidentify the AC input voltage in relation to the reference voltage signal (VPEAK) from thereference voltage sensor circuit.

Using the reading, the microprocessor controls the fixing heater drive command(HTRD) power to attain the specific target temperature for the fixing heater, in otherwords exerting phase control on the supply power to the fixing heater.

Further, ‘E9’ is indicated on the control panel if the zero cross signal (ZXDP) fallsbelow a specific value because of an error in the frequency of the power supply.

Microprocessor

VPEAK

Zero-cross signal generator circuit

ZXDP

Reference voltage sensor circuit


Figure 6-101C



AC input signal

ZXDP signal

VPEAK signal

HTRD

Supply power to heater

Figure 6-102C



6-5

D. Protection MechanismsThe copier is equipped with the following protection mechanisms to prevent

malfunction of the fixing heater.1. The microprocessor monitors the voltage of TH1, and displays ‘E0’

(PC420/430/FC220)/ ‘Jam’ (PC400/FC200) and turns the power off upon detec-tion of any of the following conditions:i. The temperature of the fixing heater does not reach 80°C 2.5 sec. after copying

starts.ii. The temperature of the fixing heater does not reach 150°C within 7.5 sec. after

copying starts.iii. The temperature of the fixing heater drops to 135°C or less after it has reached

150°C.iv. The temperature of the fixing heater rises in excess of 215°C.v.The maximum power (400 W) is detected for 5 sec. continuously after the temper-

ature of the fixing heater has reached 150°C.

2. TH1 registers 234°C as the temperature of the fixing heater; as a result, the fix-ing heater error temperature detection circuit causes RELAYD to go ‘0’ andthe relay (RL101) to go OFF, thereby cutting the power to the fixing heater.

3. The thermal fuse (FU2) blows after it has reached 228°C and a specific timehas passed to cut off the power to the fixing heater.



II. MECHANICAL SYSTEM

Here, the copier is discussed in terms of its mechanical characteristics and opera-tion and how to disassemble and assemble it.







!

A. Fixing Assembly1. Construction

Note:1. The fixing fi lm is made of

special material; do not touch itor leave dust on it.

2. The pressure exerted by thelower roller is controlled by thepressure spring built into thebushing.

3. The copier does not have anadjustment mechanism for rollerpressure.



6-7

➀➁

➀ ➁

➂

➂

➃

➃

Fixing heaterFixing filmInlet guide

Presure roller(lower roller)

Figure 6-201A

➀

➀

Figure 6-202A

2. Detaching the Fixing Assembly1) Detach the body cover.2) Disconnect the three connectors q.



3) While lifting the hook w, slide thedelivery door switch e to the front toremove.

Figure 6-203A

Figure 6-204A

4) Detach the drive belt r.

➁

➂

➃



6-9

➄

➅

Figure 6-205A

Figure 6-206A

3. Removing the Fixing Upper Unit1) Remove the fixing assembly.2) Remove the harness q, and remove

the hook w; then, remove theharness holder e.

5) Remove the two screws (M4X8;yellow) t, and turn the fixingassembly y slightly in the directionof the arrow to remove.

Caution:1. You cannot replace the fixing

fi lm or f ixing heater; do notdisassemble them.

2. Do not forget to attach the drivebelt of the heat exhaust fan tothe pulley when attaching thefixing assembly.

➀

➁

➂



4) Remove the two screws e, andremove the heat exhaust fan r.

Figure 6-208A

Figure 6-209A

5) Remove the two screws u, and turnthe upper stay i in the direction ofthe arrow to remove.

(rear)

➂

➂

➃

➆

➆➇

Figure 6-207A

Push

Push

Pull up to remove.

A

Viewed from A

➃

➄

3) Remove the two hooks r, andremove the drive releasing arm t.



6-11

6) Disconnect the connector o, andremove the fixing upper unit !0.

Figure 6-210A

Figure 6-211A

10

9

(front)

➀4. Detaching the Pressure Roller1) Detach the fixing upper unit.

Note:Take care not to damage the pres-sure roller by the separation claw orinlet guide when detaching it.

2) Detach the pressure roller q as if tolift it.


CHAPTER 7

EXTERNALS/AUXILIARY MECHANISMS

I. POWER SUPPLY ........................7-1A. Outline ....................................7-1B. Power Supply PCB .................7-2C. Protection Mechanism for Power

Supply Circuit..........................7-2II. MECHANICAL SYSTEM..............7-3

A. External Covers ......................7-4B. Copyboard Assembly..............7-9C. DC Controller/DC Power Supply

PCB.......................................7-11D. Control Panel PCB................7-14

This chapter outlines the machine's auxiliary system in relation to mechanisms andfunctions, relationship between electrical and mechanical systems, and the timing ofoperation of respective parts.



Blank Page



7-1

I. POWER SUPPLYA. Outline

Figure 7-101A

Power switch(SW604)

Microprocessor indicates AC line.

Door switch(SW1)

Sub powersupply

Relay

AC driver Fixing heater

Lamp driveassembly Scanning lamp

HVTassembly

Charging rollerDeveloping cylinder

Main motor (M1)

DC load

Control panel

Solenoids, etc.

Photointerrupter

DC powersupplyassembly

Motor driverassembly


FU101

FU102

RL101

+DC5VL

+24VR

+24VU

+24VR

+5V

T106Main transformer Sensor

Delivery doorswitch (SW2)

+24VU

B. Power Supply PCBThe copier’s power supply is a composite power supply in which one main trans-

former (T106) supplies DC power as well as power for high voltage and scanning lamp.AC power is supplied to the DC power supply when the power switch and door

switch are turned ON.The DC power supply generates +24 V and +5 V.For auto power-off, the microprocessor causes the relay (RL101) to go OFF, thus

cutting power supply.The copier is equipped with a sub power supply which provides the microprocessor

with +5VDCL power for about 5 minutes after a condition associated ‘E0’ occurs; duringthis period, the copier is prevented from going ON to prevent damage by overheatingthe fixing heater.

Note:The tolerances for the DC power supply are as follows:• +24VR ± 5%• +24 VU : +22 V to +46 V• +5 VL ± 2%• +5 V ± 10%

C. Protection Mechanism for Power Supply CircuitThe DC power supply circuit’s AC power supply input is equipped with a fuse. The

fuse blows if an overcurrent flows because of a short circuit in the 24V power, thus shut-ting out the output from the AC power supply circuit. If this happens, disconnect thecopier’s power cord, correct the cause of the problem, and replace the fuse.

If the microprocessor detects an error on the AC or 24VDC line of the main trans-former (T106), it causes the relay to go OFF, thus cutting the power output. If this hap-pens, remove the cause and switch the copier ON to reset.





7-3

II.MECHANICAL SYSTEM

Here, the copier is discussed in terms of its mechanical characteristics and opera-tion and how to disassemble and assemble it.







!



A. External CoversDetach the covers as follows to

clean, inspect, or repair the inside of themachine.

Figure 7-202A

q Control panel coverw Bottom covere Top coverr Body covert Delivery assembly covery Copyboard cover

Figure 7-201A

1. Detaching the Control Panel Cover1) Move the copyboard cover to the left

until it stops.2) Open the top cover, and remove the

screw q.3) Detach the control cover w as if to lift

it to the front.

À

Á

ÂÃ

Ä

Å

À

Á

Note:When attaching the PC400/FC200control panel cover, fit the VR onthe control panel PCB into thegroove of the density control lever.



7-5

2. Detaching the Body Cover1) Detach the copyboard.2) Detach the two cover plates q by

pulling them up.

Figure 7-203A

➀

➀

➁ ➂

3) Detach the pick-up tray and deliverytray.

4) Detach the control cover.5) Open the top cover, and take out the

cartridge.6) Press the delivery assembly cover

open/close button to open thedelivery cover.

Note:You must disengage the five hooksthat hold the body cover in placebefore detaching the body cover.

7) Push the hook found down the holee in the body cover w with ascrewdriver, and lift the body coverslightly.

Figure 7-204A (right view)



8) Push the hook r found at the rightrear of the body with a screwdriver,and lift the body cover t slightly.

Figure 7-205A (right rear view)

Figure 7-206A (rear view)

9) Detach the hook at the rear y as if topull the body cover u to the front;then, lift the body cover slightly.

Push

➃ ➄

➅➆

➇ ➈

10) Disengage the two hooks at the fronti as if to pull the body cover to thefront.

11) Detach the body cover o by lifting it.

Figure 7-207A



7-7

3. Detaching the Top CoverAssembly

1) Detach the body cover.2) Disconnect the two connectors q.

Figure 7-208A

Figure 7-209A

3) Bend the support w at the front tothe front, and remove the pin e fromthe top cover assembly.

4) Detach the top cover assembly r.

4. Detaching the Delivery AssemblyCover

1) Take out the fixing assembly.2) Shift the delivery assembly cover q

in the direction of “close,” and matchthe D-cut w of the hinge with the cutin the bushing; then, remove it fromthe front.

➀

➁

➂ ➃

➀

➁

Figure 7-210A



5. Detaching the Bottom Cover1) Place the copier with the delivery

assembly at the bottom; then,remove the two screws (M4X10;black) q.

2) Disengage the five hooks w, anddetach the bottom cover e.

Figure 7-211A

➀

➀ ➁

➁

➁

➂



7-9

B. Copyboard Assembly1. Detaching the Copyboard Cover1) Lift the right rear corner of the

copyboard cover about 5 mm; then,slide it to the front.

2) Slide the left rear corner the sameway.

Figure 7-201B

Figure 7-202B

2. Detaching the Copyboard1) Move the copyboard q to the left

until it stops, and remove the screws(w, M3X6, white; e, M4X10, black).

➀

➀ ➁ ➂

Figure 7-203B



2) Move the copyboard to the right byhand, and remove the screw(M4X10; black) r; then, detach thecopyboard t.

➃ ➄

Figure 7-204BNote:1. Do not disassemble the rail.2. To attach the copyboard, fit the

copyboard glass into the rail atthe front, and screw the rear railportion in place.



7-11

C. DC Controller/DC PowerSupply PCB

1. Detaching the DC Controller/DC Power Supply PCB

1) Detach the body cover.2) Remove the drive release arm q.3) Remove the screw w, and discon-

nect the two connectors e.4) Disconnect the four fastons r.5) Detach the bottom cover.

Figure 7-201C

ÁÂ

À

Â Ã

Ã

6) Hold the flat cable t with bothhands, and detach them from theconnector by lifting them straight up.

7) Disconnect the connector y.

Figure 7-202C (front)

ÄÅ



8) Disconnect the two connectors u atthe rear, and detach the groundingwire i.

Caution:The DC controller/DC power supplyPCB has high-voltage contacts andpick-up sensor lever; take extracare not to damage the parts whendetaching the PCB.

Figure 7-203C

Figure 7-204C

➆➇

➈

10

11

9) Remove the screw (M4X8; yellow)o, and disengage the hook !0; then,detach the DC controller/DC powersupply PCB !1.

Caution:When attaching the DCcontroller/DC power supply PCB,make sure that lead wires are notbitten or shorted, or the connectorsare not disconnected.



7-13

Figure 7-205C

Fastons(white harness)

Fastons(black harness)

Fastons(gray harness)

Door switch

2. Points to Note When Installing theDelivery Door Switch

Caution:When inserting the fastons into thedoor switch, make sure that thecorrect fastons are connected asidentified by color (Figure 7-205C).

D. Control Panel PCBNote:You must adjust the VR for intensityand AE (PC420/430/FC220) afterreplacing the control panel PCB.

1. Detaching the Control Panel PCB1) Detach the body cover.2) Disconnect the three connectors q.3) Hold the flat cable w with both

hands, and detach them from theconnector by lifting them straight up.

4) Disengage the hook e, and detachthe control panel PCB r by pulling itup.



➀ ➁

➂

➃

Figure 7-201D


CHAPTER 8

INSTALLATION

I. SELECTING THE SITE ...............8-1II. UNPACKING AND INSTALLATION

.....................................................8-2

III. RELOCATING THE MACHINE ....8-5

The product is carefully adjusted and strictly inspected before it leaves thefactory; therefore, proper installation is very important in maintaining its out-of-factory performance. Make sure that all the conditions discussed in thischapter are satisfied before installation, and carry out all necessaryinspections after installation.

This chapter outlines how to install the machine.



Blank Page



8-1

I. SELECTING THE SITE

Make the following considerations when selecting the site for the machine.It is a good idea to visit the site before delivery of the machine.The site should provide an exclusive power outlet with a grounding terminal.The temperature and humidity of the site must be 7.5° to 32.5°C/45.5° to 90.5°F and5% to 85%, respectively. Avoid areas near water faucets, water boilers,humidifiers, or refrigerators.Avoid areas near open fires and areas subjected to dust, ammonium gas, orsunlight. If necessary, provide curtains.The site must be well ventilated.The floor must be level, ensuring all copier’s feet will remain in contact.The copier must be at least 3.9 in. from all walls, enabling sufficient space formaintenance and copying work.

Figure 8-101

10cm/3.9in. min

10cm/3.9in. min



II. UNPACKING AND INSTALLATIONMoving a metal object from a cold to warm place can cause droplets of water to

appear on its surface. The phenomenon is known as condensation, and condensationin the copier can trigger such problems as blank copies. If any such problem is expect-ed, leave the copier alone at the site of installation at least one hour before unpacking it.

Step Work Description

1 Open the shipping carton.

Take out the accessories.2 Make sure that the Operator’s Manual is in the box.

Remove the cover bag from the copier, and detach all strips of tape that hold parts.

3 • Check the covers for damage and deformation caused during transit.

• Slide out the manual feed tray.• Slide out the delivery tray.

Move the copyboard to the left until it stops, and press the open/close button to open the copier’s top cover.

4

Take out the cartridge from the bag.(If the cartridge is installed in the copier, pull it out to the front.)

6

Pull the two cardboard pieces, if found inside the copier at either end of the charging roller, straight up and out of the copier.Note: Do not touch the transfer charging roller inside the copier.

5

Cardboard


Cardboard



8-3


Place the cartridge on a level place; then, detach the tip of the seal, and pull it fully out (about 50 cm).

8

Hold the cartridge with its Warning label facing left, and slide in the cartridge slowly until it stops.

9

Close the top cover, and return it to the center.

10

Hold the cartridge with its Warning label facing up, and rotate it in both directions about 90°.

7




Connect the power cord to the power outlet and the copier, and switch the copier ON.

11 • Press the +, Clear/Stop, and other keys to make sure that the copy count is correctly indicated (PC420/430/FC220).

• Check that ‘1’ goes ON on the display (PC420/430/FC220).

• Check that ‘1’ goes ON on the display (PC420/430/FC220).

• Check the Main indicator goes ON (PC400/FC200).• Check the movement of the copy density lever/dial.

Set the Test Sheet on the copyboard, and make copies; make sure that copies are made properly.

12 • Make sure no abnormal noise is heard.• Make sure that copies are made in the specified

number properly (PC420/430/FC220).• Check that ‘P’ is indicated when the Copy Start key is

pressed without setting copy paper (PC420/430/FC220).

Clean the exterior of the copier and the area around it.

13



8-5

III. RELOCATING THE MACHINEIf you must relocate the machine by truck or other means of transportation, perform

the following:

Step Work Remarks

Switch the machine OFF, and disconnect the power plug.

1

Checks

Take out the cartridge, and fold the copy tray and pick-up tray.

2 Put the cartridge in its storage box, and place it to protect against vibration.

Tape the top cover in place.3

Place a sheet of A4/LTR paper on the copyboard, and tape the copyboard in place.

4


CHAPTER 9

MAINTENANCE AND SERVICING

I. PERIODICALLY REPLACED PARTS.....................................................9-1

II. DURABLES..................................9-1III. PERIODICAL SERVICING ..........9-1

IV. NOTES ABOUT CARTRIDGE .....9-2A. Storing Sealed Cartridges.......9-2B. Storing and Handling Unsealed

Cartridges ...............................9-3

This chapter outlines the machine's maintenance parts and how to make variouschecks.



Blank Page



9-1

I. PERIODICALLY REPLACED PARTSThe machine does not have parts which must be replaced on a periodical basis.

II. DURABLESThe machine does not have parts which are classified as durables.

III. PERIODICAL SERVICINGThe machine does not have parts that require periodical servicing.



IV. NOTES ABOUT CARTRIDGEThe cartridge is affected by the environment, regardless of whether it is sealed or

unsealed and installed in the machine or otherwise. Although the properties of thecartridge change over time independent of how many copies have been made, thedegree of care taken for the cartridge affects how long it may remain stable.

A. Storing Sealed CartridgesWhen storing the cartridge in a warehouse or workshop, make sure the place is

controlled to the specifications shown in Table 9-401A.

a. Avoid direct rays of the sun.b. Avoid areas subjected to appreciable vibration.c. Do not drop or subject it to impact.

Normal(9/10 of period)

0° to 35°C/32° to 95°F

35° to 40°C/95° to 104°F

-20° to 0°C/-4° to 32°F

High

Low

Severe (1/10 of period)

Tem

pera

ture

Temperature fluctuations (within about 3 min)

40° 15°C/104° 59°F-20°C 25°C/-4°F 77°F

Normal(9/10 of period)

35 to 85%RH

85 to 95%RHHighSevere (1/10 of period)H

umid

ity

10 to 35%RHLow

Atmospheric pressure 460 to 760 mmHg(0.1 to 1 atm)

Table 9-401A Temperature/Humidity Specifications

Temperature

-20° to 40°C/-4° to 104°F

Humidity

90% or less

Table 9-402A Transportation



9-3

B. Storing and Handling Unsealed CartridgesThe photosensitive medium is an organic photoconductor (OPC), which is extremely

susceptible to light. Since the cartridge also contains toner, you must be extra carefulwhen storing or handling the cartridge. Make sure the user is aware of this fact and willhandle the cartridge with care.

1. Storing Unsealed Cartridgesa. Avoid areas subjected to strong rays of the sun. Do not keep it in a car even in a

protective box; the inside may become extremely hot.b. Avoid areas of high or low temperature/ humidity and areas where these factors

tend to change rapidly (for example, near air conditioners or heaters).c. Avoid areas where dust, ammonium gas, or gases from organic solvents tend to

accumulate.d. Keep the cartridge in a place 40°C/104°F or less.

2. Handling the Cartridgea. When setting the cartridge to the copier or if the toner starts to run short, hold the

cartridge horizontally as shown in Figure 9-401B, and rotate it in both directionsabout 90° to even out the toner inside it. Do not shake the cartridge or hold it in adifferent way; otherwise, toner may leak out the cartridge.

Figure 9-401B



b. Do not place the cartridge upright or upside down; do not shake it.

Figure 9-402B



9-5

c. Do not force open the shutter for the photosensitive drum cover found at the bottomof the cartridge; do not touch the surface of the photosensitive drum.

Caution:If the surface of the photosensitive drum has become soiled, wipe it using a flannelcloth coated with toner. Do not dry wipe it or use solvent.

d. Do not disassemble the cartridge.e. Do not subject the cartridge to vibration or impact; in particular, do not force down

the photosensitive drum from above the shutter for the drum cover.f. Keep the cartridge out of reach of children.g. The photosensitive drum is susceptible to light and, therefore, equipped with a light-

blocking shutter; nevertheless, exposure to light for a long time can affect the drum,resulting in copies with white spots or vertical lines. Leave the copier alone forsome time for possible recovery; to avoid residual memory, which results in whitespots or vertical lines, however, keep the following in mind.

Caution:Work quickly when removing jams or replacing cartridges.When the cartridge must be removed for work, be sure to put the cartridge in itsstorage box or cover it; do not leave it without protective measures once it is out-side the copier.

h. Advise the user to send all used cartridge to the address given and according to theinstructions in the User's Guide.

Caution:Do not subject any used cartridge to fire, or it may burst or explode. If a used car-tridge must be dealt with at the site, make sure it is disposed of as incombustiblewaste.

Reference:The drum would recover to more or less its normal condition if left alone for fiveminutes in a dark place after exposure to an intensity of 1500 lux (about 5 minutesunder general lighting). However, you must try to avoid any exposure. (The raysof the sun have intensities ranging between about 10000 and 30000 lux.)


CHAPTER 10

TROUBLESHOOTING

I. MAINTENANCE AND INSPECTION...................................................10-3

A. Image Adjustment BasicProcedure ............................10-3

B. Points to Note .......................10-4II. STANDARDS AND

ADJUSTMENTS ........................10-5A. Mechanical............................10-5B. Electrical ...............................10-6

III. IMAGE TROUBLESHOOTING 10-11A. Making Initial Checks ..........10-11B. Samples of Image Faults ....10-16C. Troubleshooting by Image Fault

............................................10-17IV. TROUBLESHOOTING

MALFUNCTIONS.....................10-24

A. Troubleshooting Malfunctions............................................10-24

V. TROUBLESHOOTING PAPERFEED PROBLEMS ..................10-30

A. Copy Paper Jams ...............10-30B. Feeding Faults ....................10-33

VI. FUNCTIONS AND ARRANGEMENTOF ELECTRICAL PARTS ........10-34

A. Sensors and Solenoids.......10-34B. Switches .............................10-35C. Lamp, Heater, Motor, and Others

............................................10-36D. Printed Circuit Board (PCB)10-37E. Variable Resistors (VR) and

Check Pins by PCB ............10-38VII. SELF DIAGNOSIS...................10-40

This chapter provides tables of maintenance/inspection, standards/adjustments, andidentification of problems (image fault/malfunction).



Blank Page


Guide to the Troubleshooting Table

10-1

You will find troubleshooting steps organized in tables which are modified versionsof general flow charts. Study the following for an idea of how to consult them.

EX.AC power is absent

If you want to find out the cause (possible faulty part), see the column under"Cause." In the case of "AC power is absent," the power plug may be disconnected,the covers may not be closed firmly, or the main power supply is absent,If you want to find out the action to take or the steps to correct a specific problem,go through the steps in order. Answer YES or NO to the questions under "Checks,"and take the action indicated accordingly.

Cause Step YES/NOChecks Action

Power plug 1

2

3

4

NO

NO

NO

YES

Is the power plug connected to the power outlet?

Covers

Power Supply

Are the front door and the delivery cover closed firmly?

Is the specified voltage present at the power outlet?

Is the specified voltage present between J1-1 and J1-2? (J1 is found near the power cord mount.)

Connect the power plug.

Close the door and the cover.

The problem is not of the machine. Advise the user.

Go to step 6.



When checking the voltage using a meter , you may come across such instructionsas "Measure the voltage between J109-1 (+) and J109-2 (-) on the DC controllerPCB." Connect the positive probe of the meter to the terminal marked (+) and thenegative probe to the terminal marked (-).

Connect the power plug.

Close the door or the cover.

The problem is not of the copier. Advise the user.

1

(Steps) (Checks)

Omitted.

(Action)(YES/NO)

NO

YES

YES

YES

2NO

3NO

Is the power plug connected to the

power outlet?

Are the front door and the delivery cover closed firmly?

Is the specified voltage present at the

power outlet?

COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10-3

I. MAINTENANCE AND INSPECTIONA. Image Adjustment Basic Procedure

Is the setting of the density

correction switch at the middle?

Scanning system, pick-up/feeding system, and delivery assembly.

Select non-AE, and set the density control dial/lever to 5.5; then, make two to three copies of the Test Chart (NB-3, NA-2, NA-3); see Note 1.

Check the following:1. Density of gray scale No. 9; see Note 2.2. Difference in density between front and rear; see

Note 3.3. Density of gray scale No. 1; see Note 3.4. Fogging in white area; see Note 3.

Set the switch to the middle.

Clean the parts.

Is the problem corrected by the density correction

switch?

Is optimum

density obtained by adjusting the intensity of

light? (See

Is gray scale No. 9 barely noted?

(See Note 2.)

Check the following:1. Cartridge.2. Scanning lamp unit.3. DC controller/DC power supply PCB

(see “Troubleshooting by Image Fault”).

End.

End.

NO

YES

YES

NO

YES

NO

YES

<Pre-Checks> <Optimum Density Adjustment>

1. If a mono color cartridge is used, set the density control dial to 4.5.

2. If NB3 is used, refer to gray scale No. 10.3. The machine is not equipped with an

adjustment function for each type of image fault; see “Troubleshooting by Image Fault.”

4. For instructions on how to adjust the intensity of light, see p. 10-6.

Notes:

NO


B. Points to Note

Remarks

Cleaning

Pick-up roller assembly

Parts

Pick-up roller Well-wrung moist cloth; or, alcohol

Parts Tools/Solvents Remarks

Photosensitive drum

Toner As a rule, do not clean.Do not use solvents.Do not touch the drum. Avoid light.

Drum cover shutter

Well-wrung moist cloth

Be sure to clean the shutter; particles of toner can cause soiled copies.


Lint-free paper

CleaningDo not use water or solvent. Take care not to touch the roller or leave oil.

Cartridge, Transfer charging roller


Inlet guide Solvent

Fixing assembly


Lens array Cotton wad Do not use the wire cleaner meant for conventional machines.

Optical assembly

Scanning lamp Blower brush


Intensity/AE sensor

Blower brush

Cleaning

Electrical


Copyboard cover

alcohol

Copyboard

Copyboard glass

alcohol

White reflecting strip

alcohol Dirt can soil the leading edge margin, causing jams.


Registration roller

Cleaning

Registration assembly

Tools/Solvents

Well-wrung moist cloth



10-5

2.0 ± 1.0 [mm]

Copyboard glass2mm

Size index

White paint

0.2 to 5.0 [mm]

Figure 10-201A

The leading edge non-image width is determined by the position of the white paintfound behind the copyboard glass.

Figure 10-202A

2. Image Leading Edge Margin (point of detection for registration)The leading edge margin must be 0.2 to 5.0 mm when the Test Sheet is copied.To adjust, move the position of the registration cam.

Figure 10-203A

II. STANDARDS AND ADJUSTMENTSA. Mechanical1. Image Leading Edge Non-Image Width (position of white paint on back of

glass)The leading edge non-image width must be 2.0 ±1.0 mm when the Test Sheet is

copied.



B. Electrical

Notes:If you have replaced the scanning lamp unit, intensity sensor, AE sensor, or controlpanel PCB, you must adjust the three variable resistors on the control panel PCB(one, if PC400/FC200); you must, however, adjust them in the order of VR604,VR602, and VR603 (from intensity to AE).

1. Adjusting the Intensity (VR604)a. After Replacing the Control Panel PCB Only1) Disconnect the power plug, and detach the faulty control panel PCB.2) Set the meter to the ‘200 k ’ range, and measure C between the terminal of VR604

and the terminal of R614 on the detached control panel PCB; see Figure 10-201B.3) Likewise, measure C between the terminal of VR604 and the terminal of R614 on

the new control PCB; then, turn VR604 so that the reading is the same as themeasurement taken in step 2).

4) In the case of the PC420/430/FC220, adjust VR602 (A between terminals of VR602and JP607) and VR603 (Between terminals of VR603 and JP621); see Figure 10-201B.

5) Attach the new control panel PCB to the copier.

A (VR602)B (VR603)

C (VR604) Control panel PCB

A (JP607)B (JP621)

C (R614)

Figure 10-201B (PC420/430/FC220)



10-7

C (VR604)

Control panel PCB C (R614)

Figure 10-202B (PC400/FC200)

b. After Replacing the Scanning Lamp Unit, Intensity Sensor, or AE Sensor

(Before Adjustment)• If the scanning lamp has blackened, replace it.• Clean the scanning system (lens array, lamp reflector, lamp).

1) Set the cartridge to the copier.2) De-select AE, and set the copy density control lever/dial to the center.3) Set the density correction switch (SW606) to the center (PC420/430/FC220).4) Set the Test Sheet (NA3/NB3/NA2), and make a copy.5) Check if the copy is free of fogging, and gray scale No. 9 (No. 10, if NB3) is some-

what visible.

• If too dark,Turn VR604 on the control panel PCB clockwise slightly to increase the intensity.

• If too light,Turn VR604 counterclockwise slightly to decrease the intensity.

6) Repeat steps 4) and 5) until the density is optimum.

Notes:After adjusting the intensity, be sure to adjust the AE mechanism(PC420/430/FC220).



2. Adjusting the AE Mechanism (VR602, VR603)

(Before Adjustment)• Obtain a newspaper whose text consists of fine print; do not use a section with

photos or large characters.• Make sure you have adjusted light intensity.

1) Switch the copier OFF.2) Detach the control panel cover.3) Turn VR602 and VR603 on the control panel PCB fully clockwise.4) Place a newspaper over the AE light-receiving section of the copyboard, and close

the copyboard cover.

Figure 10-203B

AE light-receiving section



10-9

Figure 10-204B

6) While keeping the condition in step 5), switch the copier ON.• ‘0’ is displayed, the scanning lamp goes ON, and the main motor starts to rotate.

7) Stop shorting the jumper wires.8) Set the digital multimeter to the 20V DC range, and turn VR602 (AE offset adjust-

ment) until the voltage between the anode side of the diode (D606; +) and JP607(GND) is 4.0 ±0.1 V.

Notes:You must use a Digital Multimeter when making adjustments in steps 8) and 10).

JP607 JP605 JP604

ScrewdriverControl panel PCB

5) Short the three jumper wires (JP604, JP605, JP607) on the control panel PCB at thesame time using a screwdriver.

Caution:Take adequate care not to short wires other than those specified.



JP607VR603VR602

Control panel PCBD606 (anode side)

Figure 10-205B

9) Place about five sheets of blank copy paper.10) Turn VR603 (AE gain adjustment) until the voltage between the anode side of the

diode (D606; it) and JP607 (GND) is 1.8 ±0.1 V; see Figure 10-205B.11) Switch the copier OFF.

Notes:Make sure that the jumping wires are no longer shorted.

12) Switch the copier ON once again.13) Set the density correction switch (SW606) to the center (of the three settings).14) Make sure that the AE indicator is ON.15) Set the newspaper used in step 4) on the copyboard once again; this time, move the

newspaper to a different area.16) Make a copy, and make sure that it is not foggy and has adequate text density.

• If foggy,Turn VR602 clockwise slightly.• If text density is low,Turn VR602 counterclockwise slightly.

17) Repeat steps 15) and 16) until the density is optimum.



10-11

III. IMAGE TROUBLESHOOTINGA. Making Initial Checks1. Site Environment

a. The voltage of the power source must be within the specifications.b. Avoid areas subjected to dust or high temperature/humidity (near water faucets,

water boilers, humidifiers) and areas near open fires.c. Avoid areas subjected to ammonium gas.d. Avoid direct rays of the sun; otherwise, provide curtains.e. Make sure the site is well ventilated.f. Make sure the floor is level.Check the site to see if it meets the above requirements.

2. Checking the DocumentsYou must first check to see if a particular problem may not be due to the document

used.a. The copy density reading should be 5.5 ±1.5 (black)/4.5 ±1.5 (color).b. Some backgrounds, i.e., yellow shades, tend to produce copies with poor

contrast.c. Diazo copies or translucent documents tend to produce copies that may be

mistaken for foggy copies.d. Documents prepared in light pencil tend to produce copies that may be mistaken

for light copies.



3. Checking the Copyboard Cover and Copyboard Glass for Dirt and ScratchesIf dirt is found, clean it using mild detergent or alcohol; if scratches are found,

replace it.

4. Checking the Lens Array for DirtCheck the lens array for dirt. If found, clean it using a cotton wad.

5. Checking the Transfer Charging RollerCheck the transfer charging roller for scratches or other abnormalities.

6. Checking the Feeding AssemblyCheck the feeding assembly for dirt. If dirt is found, clean it with a moist cloth.

7. Checking the Copy Papera. Check to see if paper of a type recommended by Canon is used.b. Check to make sure that the paper is not moist. Try paper fresh out of package.

8. Checking the DurablesChecking the CartridgeWhite spots or vertical white lines tend to appear when the cartridge starts to run

short of toner; see Figure 10-301A.

Figure 10-301A



10-13

Go over the following when this is noted.

1) Take out the cartridge from the copier, and rotate it several times.

Figure 10-302A

2) Set the cartridge back into the copier, and make copies.

a. If the copies are normal,• The user may use the cartridge for some time more; however, advise the user to

procure a replacement cartridge.b. If the copies fail to return to normal,

• Replace the cartridge as described in “Replacing the Cartridge.”



9. OthersIn winter, moving a machine from a cold storage room to a warm site can cause

condensation inside the machine, leading to various problems.

a. Condensation on the scanning system (glass, lens array, reflecting plate) causesdark images.

b. When too cold, the photosensitive drum assumes a high electrical resistance,resulting in poor contrast.

c. Condensation in the pick-up/feeding assembly can cause faulty paper transport.d. Condensation in the lower roller of the manual pick-up mechanism decreases

friction, leading to pick-up failure.e. Condensation on the copyboard hinders its smooth movement.When condensation is noted, dry wipe the parts.The same holds true of the cartridge. After having moved the cartridge from a cold

to warm room, leave it alone for about one to two hours before unpacking it.



10-15



B. Samples of Image Faults

not available



10-17

C. Troubleshooting by Image Fault1. The copy is too light (halftone areas only).2. The copy is too light (dark areas as well).3. The copy is too light (extremely light overall).

Cause Step Checks YES/NO Remedies

Lens, Reflecting plate, Intensity sensor

1 Clean the lens, reflecting plate, and intensity sensor.Is the problem corrected?

YES End.

2 Press the Copy Start key, and switch the copier OFF in the middle of operation; then, open the top cover.Is the toner image on the pho-tosensitive drum more or less normal before transfer?

Be sure to check quickly to protect the drum against light.

NO Go to step 5.


3 Is the transfer charging roller normal?

NO 1. Re-attach the charging roller.

2. Replace the charging roller.

Copy paper 4 Try paper fresh out of package. Is the copy density higher?

YES 1. The paper may be moist; advise the user on the correct method of storage.

2. Advise the user that the use of non-recom-mended paper may not bring about the best results.

Tra

nsfe

r

Cartridge 5 Replace the cartridge.Is the problem corrected?

YES End.


NO Replace the DC controller/ DC power supply PCB.



4. The copy has uneven density (darker at front).5. The copy has uneven density (lighter at front).

6. The copy is foggy (overall).


Scanner 1 Clean the scanning lamp, reflecting plate, and lens.Is the problem corrected?

YES End.

Cartridge, Scanning lamp

2 Press the Copy Start key, and switch the copier OFF in the middle of operation; then, open the top cover.Does the toner image on the photosensitive drum before transfer have uneven density?

YES 1. Replace the cartridge.2. Replace the scanning

lamp unit.

Transfer charging roller NO Check the transfer charg-ing roller.



YES End.

Scanning lamp, Developing bias

2 Is continuity present between photosensitive drum PCB and grounding spring?

YES 1. Check if the scanning lamp goes ON normally.

2. Check the developing bias.

Grounding spring NO Check to make sure if the grounding spring is prop-erly attached in front of the cartridge.



10-19

7. The copy is foggy (paper feed direction).8. The copy has dark lines (paper feed direction, relatively narrow).9. The copy has dark lines (paper feed direction, thin).

10. The copy has white spots (paper feed direction).11. The copy has white lines (paper feed direction).



YES End.

Cartridge 2 Take out the cartridge, and put it back in.Is the problem corrected?

YES End.

NO Replace the cartridge.


Fixing assembly 1 Press the Copy Start key, and switch the copier OFF in the middle of operation; then, open the top cover.Does the copy image have white spots or white lines before fixing?

NO Check the fixing assembly.

Cartridge 2 Rotate the cartridge several times.Is the problem corrected?

YES Advise the user that the cartridge is running short of toner.

Transfer charging roller 3 Is there foreign matter or scratches on the transfer charging roller?

YES Remove the foreign matter, or replace the transfer charging roller.

Cartridge NO Replace the cartridge.



12. The copy has white spots (cross feed direction).


Copy paper 1 Is the copy paper of a type rec-ommended by Canon?

NO Try recommended paper; if the results are good, advise the user to use recommended paper.

2 Try copy paper fresh out of package.Is the problem corrected?

YES The copy paper may be moist; advise the user to store it wrapped.

3 Is the problem noted at the same position on all copies?

YES Check the copyboard rail for foreign matter.

Copyboard rail

Check the scanning lamp for flickering, and check the presence/absence of a developing bias.

Scanning lamp,Developing bias

NO

13. The back of the copy is soiled.


Transfer charging assembly

1 Press the Copy Start key, and switch the copier OFF while the copy paper is moving through the feeding assembly.Is the back of the copy soiled?

NO Go to step 3.

2 Is the transfer charging assem-bly soiled?

YES 1. Clean the transfer charging assembly.

2. Clean the registration roller.

3. Clean the pick-up guide plate.

4. Check the cartridge for leakage of toner.

Feeding assembly 3 Is the feeding assembly soiled? YES Clean the feeding assembly.

Delivery roller NO Clean the delivery roller.



10-21

14. The copy has faulty fixing.


Copy paper 1 Is the copy paper of a type rec-ommended by Canon?

NO Try paper of a recom-mended type; if the results are good, advise the user to use recom-mended paper.

Fixing film 2 Is the faulty fixing vertical and in the form of lines?

YES Check the fixing film and pressure roller for scratches. If scratches are found, replace the fixing unit or roller.


3 Is the heater turned ON for control after copy operation is started?

YES The control temperature for the fixing heater may be low; check the ther-mistor and DC controller/ DC power supply PCB.

Fixing heater NO See “The fixing heater fails to operate.”

15. The copy has faulty leading edge registration (blank area much too wide).16. The copy has faulty leading edge registration (blank area too wide).17. The copy has faulty leading edge registration (no blank area).


Registration cam 1 Move the registration cam on the copyboard left and right.Is there any change to the reg-istration?

YES Adjust the position of the registration cam.

Solenoid (SL1),DC controller/DC power supply PCB

2 Is the solenoid for registration (SL1) operating normally?

NO 1. Check the solenoid (SL1).

2. Check the DC con-troller/DC power supply PCB.

Pick-up roller 3 Is the copy paper of a type recommended by Canon?

YES Check the pick-up roller.

Copy paper NO Try copy paper of a type recommended by Canon; if the results are good, advise the user to use recommended paper.



18. The copy has a blurred image.


Copyboard rail 1 Is the movement of the copy-board rail smooth?

NO Replace the copyboard rail.

Copyboard drive assembly

2 Is the movement of the copy-board normal?

NO Check the copyboard drive assembly; if a fault is found, replace the part.

Main motor assembly 3 Is the main motor assembly normal?

NO Replace the main motor assembly.

Feeding assembly 4 Does the copy paper stop or jump near the transfer assem-bly?

YES Remove the foreign matter or burrs from the feeding system.



Scanning lamp 1 Does the scanning lamp flicker? YES Replace the scanning lamp unit.

Cartridge 2 Replace the cartridge.Is the problem corrected?

YES End.

High-voltage transformer

Check the high-voltage transformer (DC controller/ DC power supply PCB).

NO


Document

1 Does the copy have an image which is too light at the same time?

YES Correct the light image first.

2 Is there a gap between the document and the copyboard glass?

YES • Check the copyboard glass to make sure it is not warped.

• Advise the user how to place documents cor-rectly.

Lens 3 Is the lens off contact? YES Push the lens into place while taking great care not to scratch it.


YES End.


19. The copy is foggy (cross feed direction).

20. The copy has poor sharpness (focus).



10-23

21. The copy is blank.


Cartridge 1 Is the cartridge set in the copier? NO Set the cartridge in the copier.

2 Does the cartridge have toner? NO Replace the cartridge.

3 Has the seal been removed from the cartridge?

NO Remove the seal.

4 Set the cartridge in the copier, and close the copier.Does the drum cover shutter open without fail?

NO Make adjustments so that the shutter opens smoothly.

Drum drive assembly 5 Is the drum drive gear rotating normally?

NO Check the drum drive assembly.

High-voltage transformer

6 Are the primary charging terminal at the front left of the cartridge and the high-voltage terminal at the bottom of the copier in firm contact?

YES Check the high-voltage transformer (DC controller/ DC power supply PCB).

Terminals for primary charging,Cartridge

NO 1. Check the contact for electrical continuity.

2. Try replacing the cartridge.

22. The copy is solid black.


1 Is the scanning lamp ON during copying operation?

YES Check if the cartridge is set properly.

NO See “The scanning lamp fails to go ON.”



IV. TROUBLESHOOTING MALFUNCTIONSA. Troubleshooting Malfunctions1. (self diagnosis; PC400/FC200)


1 Switch the copier ON.Does the Jam indicator remain On for about 0.5 sec, and does the copier go OFF automatically thereafter?

YES See ‘E00’.

NO See the discussions on ‘E2’, ‘E6’, and ‘E9’.


Thermistor (TH1) 1 Set the meter to the ‘12VDC’ range, and wait until the fixing heater is sufficiently cool.Measure the voltage between J603-1 (+) and J603-2 (-).Is it about 3.2 V or more?

NO Check the wiring from the DC controller/DC power supply PCB to the ther-mistor (TH1); if normal, replace the fixing assem-bly.

2 Does the fixing heater operate normally?

NO See “The fixing heater fails to operate.”


3 Switch the copier ON, and make a copy.Measure the voltage between J603-1 and J603-2 once again.Is the voltage lower than that measured in step 1?

YES Replace the DC controller/ DC power supply PCB.

Fixing assembly Check the wiring from the DC controller/DC power supply PCB to the ther-mistor (TH1); if normal, replace the fixing assem-bly.

NO

2. E0



10-25

3. E2


Copyboard 1 Does the copying operation start with the copyboard at the left or right?

YES Check the operation with the copyboard moved to the center; advise the user that this is not the copier’s problem

2 Does the copyboard move in reverse? In addition, does it move in reverse far too slowly?

NO See “The copyboard fails to move.”


3 Does the copyboard move in reverse after copying operation has started and move forward after it has reached the copy-board start position?

YES Replace the DC con-troller/DC power supply PCB.

Copyboard drive assembly,Copyboard glass assembly

NO 1. Check the copyboard position sensor (Q902).

2. Try replacing the copy-board drive assembly.

3. Check the start position cam and reversal cam in the copyboard glass assembly.


Control panel PCB 1 Replace the control panel PCB. Is the problem corrected?

YES End.


NO Check the harness from the control panel PCB to the DC controller/DC power supply PCB; if normal, replace/DC power supply PCB.

4. E6



5. E9

6. AC power is absent.



1 Replace the DC controller/DC power supply PCB.Is the problem corrected?

YES End.

Power supply NO Advise the user that the frequency of the power supply is faulty.


Power plug 1 Is the power plug connected to the copier and the power outlet?

NO Connect the power plug.

2 Is ‘E’ code (PC420/430/FC220) or ‘JAM’ (PC400/FC200) indicated for about 0.5 sec after the power switch is turned ON and does the power turn OFF thereafter?

YES See ‘E0’.

Top cover,Delivery assembly cover

3 Are the top cover and delivery assembly cover closed properly?

NO Close the top cover and delivery assembly cover.

Power supply voltage 4 Is the rated voltage present at the power outlet?

NO Advise the user that the problem is not of the copier.

Door switch 5 Is the door switch (SW1,SW2) normal?

Replace the door switch.NO


6 Is the rated power supply voltage present between J103 and J104 on the DC controller/DC power supply PCB? (Set the meter to the 300V AC range).

Replace the DC controller/ DC power supply PCB.

YES

Fixing assembly 7 Replace the fixing assembly.Is the problem corrected?(fixing heater error temperature detection circuit ON)

End.YES


NO



10-27

7. Pick-up fails.

8. The scanning lamp fails to go ON.


1 Move the copyboard to the left until it stops, and open the top cover. Does the pick-up roller rotate when the door switch is turned ON and the Copy Start key is pressed at the correct pick-up timing?

YES See “Pick-Up Assembly” in “Troubleshooting Feeding Faults.”

Main motor (M1) 2 Is the main motor rotating? NO See “The main motor fails to rotate.”

Pick-up sensor (Q131) 3 Does the copier operate nor-mally when the pick-up sensor (Q131) is blocked with paper?

YES Check the sensor lever.

Pick-up solenoid (SL1; PC420/430/FC220), Registration solenoid (SL1; PC400/FC200)

4 Set the meter to the ‘30VDC’ range. Does the voltage between J201-6 (+) and J201-7 (-) on the DC controller/DC power supply PCB change to about 24 V at pick-up timing?

YES Check the spring clutch in the registration assembly and pick-up assembly; if normal, replace the solenoid.


NO Check the wiring from the solenoid to the DC con-troller/DC power supply PCB; if normal, replace the DC controller/DC power supply PCB.



1 Is the scanning lamp unit attached correctly?

NO Re-attach the lamp unit.


2 Is the scanning lamp black? YES Replace the scanning lamp unit.


3 Is the connector of the scanning lamp connected firmly?

YES Replace the DC controller/ DC power supply PCB.

Connector NO Re-connect the connector.



9. The main motor fails to rotate.

10. The copyboard fails to move.


Main motor (M1) 1 Set the meter to the ‘30VDC’ range. Does the voltage between J903-1 (+) and J903-2 change from about 0 V to about 20 V according to the operation of the main motor?

YES Replace the main motor.


NO Check the wiring from the motor to the DC controller/ DC power supply PCB; if normal, replace the DC controller/DC power supply PCB.


Main motor (M1) 1 Is the main motor rotating? NO See “The main motor fails to rotate.”

Copyboard,Copyboard drive assembly

2 Push the copyboard by hand.Does it move smoothly?

NO Check the copyboard and copyboard drive assembly.


3 Set the meter to the ‘200 Ω’ range. Disconnect J902 from the copyboard drive solenoid, and measure the resistance between terminals of SL2.Is it about 120 Ω?

YES Check the wiring from the solenoid to the DC con-troller/DC power supply PCB; if normal, replace the DC controller/DC power supply PCB.


NO Check the solenoid (SL2).



10-29

11. (paper feeding normally)

12. (at time of jam)

13. The fixing heater fails to operate.


Copy paper 1 Are there pieces of copy paper in the delivery assembly or pick-up assembly?

YES Remove the pieces of paper.

Sensor lever 2 Is the movement of the delivery sensor and pick-up sensor levers smooth?

NO Correct the movement.

Delivery sensor PCB (Q801)

3 Replace the delivery sensor PCB. Does the copier operate normally?

YES End.


NO Check the wiring from the control panel PCB to the DC controller/DC power supply PCB; if normal, replace the DC controller/DC power supply PCB.


Control panel PCB 1 Replace the control panel PCB. Does the indicator go ON?

YES End.


NO Replace the DC controller/ DC power supply PCB.


Heater (H1),Thermal fuse (FU2)

1 Is continuity present between terminals of the heater?

NO Replace the fixing assembly.

Thermistor(TH1, TH2)

2 Is the resistance between the following terminals on the control panel PCB 0 Ω or about 1.3 M Ω?

YES Replace the fixing assembly.

TH1 J603-1 ↔ J603-2

Fixing assembly 3 Replace the fixing assembly.Is the problem corrected?

YES End.



NO



V. TROUBLESHOOTING PAPER FEED PROBLEMSA. Copy Paper Jams

Jams can be classified according to location within the copier:

q Pick-up assemblyw Separation/feeding assemblye Fixing/delivery assembly

The discussions that follow are organized with reference to these assemblies.

➀➁➂

Figure 10-501A



10-31

1. Pick-Up Assembly

2. Separation/Feeding Assembly


Copy paper 1 Try copy paper of a type recommended by Canon.Is the problem corrected?

YES Advise the user to use recommended paper.

2 Is the copy paper curled or wavy, or otherwise deformed?

YES Replace the copy paper; advise the user on the correct method of storage.

Pick-up sensor lever 3 Is the movement of the pick-up sensor lever smooth?

NO Adjust the movement of the pick-up sensor lever.

Spring (pick-up guide plate;PC420/430/FC220)

4 Check the movement of the pick-up guide plate found under the pick-up roller. Is its movement smooth?

NO Check the position of the spring of the pick-up guide plate.

Pick-up roller 5 Is the pick-up roller deformed or worn?

YES Replace the pick-up roller.

Spring (for pick-up control),Spring clutch (PC420/430/FC220)

NO 1. Check the spring.2. Check the spring clutch.


Copy paper 1 Try paper of a type recom-mended by Canon.Is the problem corrected?


2 Is the copy paper curled or wavy, or otherwise deformed?

YES Replace the copy paper; advise the user on the correct method of storage.

Feeding assembly 3 Is foreign matter found in the feeding assembly?

YES Remove the foreign matter.

Static eliminator 4 Is the static eliminator soiled with toner?

YES Clean the static eliminator.

Registration roller 5 Is the registration roller worn, deformed, or soiled?

YES If dirt is found, clean it using alcohol; if worn or deformed, replace it.

Spring (for registration control),Spring clutch(registration assembly)

NO 1. Check the spring.2. Check the spring clutch

in the registration assembly.



3. Fixing/Delivery Assembly


Separation/Feeding assembly

1 Are the copy image and the document matched correctly?

NO Check the separation/ feeding assembly.

Fixing assembly inlet guide

2 Is the inlet guide soiled with foreign matter or toner?

Clean it.YES

Delivery sensor lever 3 Does the delivery sensor lever move smoothly?

Correct it so that the lever moves smoothly.

NO

Delivery roller assembly

4 Is the delivery sensor (Q801) PCB normal?

Check the delivery roller assembly.

YES

Delivery sensor PCB Replace the delivery sensor PCB.

NO



10-33

B. Feeding Faults1. Double Feeding


Copy paper 1 Try copy paper of a type recommended by Canon.


Separation pad Check the movement of the pick-up guide plate.Is the movement smooth?

Check the condition of the separation pad.

Spring (pick-up guide plate; PC420/430/FC220)

Check the position of spring.

NO

2 YES

2. Wrinkles


Pick-up assembly, Registration roller

1 Switch the copier OFF while the copy paper is moving through the feeding assembly.Is the paper wrinkled at the time? Or, is it moving askew?

YES Check the pick-up assem-bly. Check the registration roller.

Copy paper 2 Try paper fresh out of package.Is the problem corrected?

YES The paper may be moist; advise the user on the correct method of storage.Also, advise the user to remove curling before feeding paper for a second time when making two-sided/overlay copies.

3 Try copy paper of a type recommended by Canon.


4 Is the inlet guide soiled with foreign matter or toner?

YES Clean it using solvent.

Fix

ing

asse

mbl

y Inlet guide

NO Check the fixing assembly.Fixing assembly



VI. ARRANGEMENT AND FUNCTIONS OF

ELECTRICAL PARTSA. Sensors and Solenoids

Figure 10-601A

Q902

SL2

Q901

Q801

Q131

PD601PD602

SL1

Symbol Name Notation Description

Photointerrupter

Photodiode

Solenoid

Q131Q801Q901Q902PD601PD602SL1SL2

Pick-up assembly paper sensorDelivery assembly paper sensorMotor rotation sensorCopyboard position sensorIntensity sensorAE sensorPick-up/registration solenoidCopyboard drive solenoid



10-35

Figure 10-601B

SW2

SW604SW606

SW1


Switch

Switch

SW1SW2

SW604SW606

Top cover switchDelivery assembly door switch

Power switchDensity 3-setting switch

B. Switches



Figure 10-601C

M1

FU2

TH1

H1


Heater

Motor

Thermistor

Thermal fuse

H1

M1

TH1

FU2

Fixing heater

Main motor

Fixing heater temperature detection

Fixing heater overheating detection

M

C. Lamp, Heater, Motor, and Others



10-37

Figure 10-601D

➀ ➁

➂

➃

➄

➅

Ref. Name Description


Control panel PCBScanning lamp PCBDelivery sensor PCBMotor rotation sensor PCBCopyboard position sensor PCB

Controls sequence, supplies DC power, controls scanning lamp ONControls/displays copying operationScanning lamp (LA1-LA8)Detects deliveryDetects main motor rotationDetects copyboard position

➀

➁➂➃➄➅

D. Printed Circuit Board (PCB)



Figure 10-601E

J201

112

VR102

J1081 2

VR103

J5

(T107)

2 1

J6

J8

J7VR101

J202

22(

16)

21(

17)

J101

J102J103

J104


E. Variable Resistors (VR) and Check Pins by PCBOf the variable resistors (VR) and check pins used in the copier, those used in the

field are discussed herein.Do not touch those VRs and check pins not discussed herein; they are for factory

use only and require special tools and high precision for adjustment.

Note:1. VRs that may be used

in the field. .............................2. VRs that must not be

used in the field. ....................

1. DC Controller/DC Power Supply PCB



10-39

Figure 10-603E

VR603 VR604VR602

J601

J611

21

22

1

2

7 1

J621

41

J603

51

VR604

J601J611

17

18

1

2

7 1

J621

41

J603

15

VR Description

VR602 Use it to adjust the AE offset (use it only after replacing the scanning lamp unit, intensity sensor, AE sensor, or control panel PCB).

VR603 Use it to adjust the AE gain (use it only after replacing the scanning lamp unit, intensity sensor, AE sensor, or control panel PCB).

VR604 Use it to adjust the light intensity (use it only after replacing the scanning lamp unit, intensity sensor, AE sensor, or control panel PCB).

2. Control Panel PCBa. PC420/430/FC220

Figure 10-602E

b. PC400/FC200

Table 10-601E



VII. SELF DIAGNOSISThe copier’s microprocessor on the DC controller/DC power supply PCB is

equipped with a self diagnostic mechanism that checks the condition of the machine;when the mechanism detects an error, it indicates an error code on the copy countdisplay.

(The PC400/FC200 does not have a copy count display; it indicates an errorcondition by flashing the Jam indicator.)

‘E6’ is represented by alternating

Note:If an error associated with ‘E0’ is detected, ‘ ’ is displayed (PC420/430/FC220) orthe Jam indicator (PC400/FC200) remains ON for about 0.5 sec.; thereafter, thepower goes out.

Code Cause Description

• Thermistor (TH1; faulty)• Fixing heater (H1; faulty)• DC controller/DC power supply (faulty)

• The temperature of the fixing heater is 215°C or more.

• The temperature of the fixing heater does not reach 80°C within 2.5 sec. after copying operation has started.

• The temperature of the fixing heater lowers below 135°C after it has reached 150°C.

• The temperature of the fixing heater does not reach 150°C within 7.5 sec. after copying operation has started.

• The maximum supply power is detected for about 5 sec. after the temperature of the fixing heater has reached 150°C.

(Note)



10-41

Note:1. The copier does not use code ‘E1’, ‘E3’, ‘E4’, or ‘E5’.2. After self diagnosis has gone ON, the copier may be reset by switching it OFF

and then ON.In the case of ‘E0’, however, the power is automatically turned OFF. To reset,disconnect the power plug once, open the upper cover, or wait about 5 minuteswithout any operation; during the period, the microprocessor remains poweredand retains ‘E0’.This consideration is to prevent the user from resetting the machine easilywhen the thermistor may have blown; otherwise, the fixing heater wouldbecome overheated, damaging parts near it.

3. Activation of self diagnosis forces the fixing heater (H1) and main motor (M1)OFF.

Code Cause Description

• Copyboard drive assembly (faulty operation)• Copyboard drive solenoid (SL2; faulty)• Copyboard position sensor PCB (Q902; faulty)• DC controller/DC power supply PCB (faulty)

• The copyboard position sensor (Q902) goes ON when copying operation starts.

• The copyboard position sensor (Q902) is ON 0.8 sec. after copying operation has started.

• The copyboard position sensor (Q902) does not go ON within 5.5 sec. after copying operation has started.

• The copyboard does not reach the start position within a specific period of time, or it moves past the start position.

• The copyboard position sensor (Q902) is ON 1.5 sec. after the copyboard has started moving forward from the start position.

• The copyboard position sensor (Q902) does not go ON 10.4 sec. after the copyboard has started moving forward from the start position.

• The copyboard position sensor (Q902) does not go ON 1.2 sec. or 4.7 sec. after the copyboard has started moving in reverse from the reversal position.

• Control panel PCB (faulty)• DC controller/DC power supply PCB

(faulty)

• The scanning lamp has remained for 2 sec. continuously at such times as not prescribed.

• Power supply frequency (error) • The power supply frequency is higher than specified.


APPENDIX

A. GENERAL TIMING CHART .........A-1B. SIGNALS/ABBREVIATIONS LISTA-3C. GENERAL CIRCUIT DIAGRAM...A-5

D. SPECIAL TOOLS TABLE.............A-7E. SOLVENTS/OILS TABLE .............A-8

COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON) A-1

A. GENERAL TIMING CHARTPC400/FC200 General Timing Chart(A4, 2 copies)

1

2

3

4

5

6

7

8

9

10

11

12

Main motor (M1)

Document position sensor (Q902)Copyboard drive solenoid (SL2)


Fixing heater (H1)

Primary AC bias

Primary DC bias

Developing AC bias

Developing DC bias

Transfer


Registration solenoid (SL1)

SequenceCopyboard

STBY INTRCBRV STOP CBFW CBRV

COPYCBRV

LSTRSTOP

STBY

Power switchON

Copy paper insertedCopy paper inserted

-240V -625V

-400V -130 to -550V

* Cleaning mode.** Measurement mode.

1 sec

CBFW

13 Delivery sensor (Q801)

* ** * *

COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)A-2

1

2

3

4

5

6

7

8

9

10

11

12

SequenceCopyboard

STBY INTRCBRV STOP CBFW CBRV

COPYCBRV

LSTRSTOP

STBY

Power switchON

Copy paper inserted

-240V -625V

-400V -120 to -560V

* Cleaning mode.** Measurement mode.

1 sec

CBFW

13

* **

Main motor (M1)

Document position sensor (Q902)Copyboard drive solenoid (SL2)


Fixing heater (H1)

Primary AC bias

Primary DC bias

Developing AC bias

Developing DC bias

Transfer




* *

PC420/430/FC220 General Timing Chart(A4, 2 copies)


APPENDIX

A-3

B. SIGNALS/ABBREVIATIONS LISTWhat follows below is a list of signals and abbreviations used in the chapters of the

manual and circuit diagrams.The abbreviations within parentheses represent analog signals, which cannot be

expressed in terms of ‘1’ or ‘0’.

1. Signals

ACBTP AC BIAS TIMING PULSE COMMAND[AE] AE SIGNALCBSD COPYBOARD DRIVE SOLENOID DRIVE COMMANDDCBPWM DC BIAS CONTROL COMMANDDCTPWM TRANSFER DC BIAS CONTROL COMMANDDGT0 OSCILLATION SIGNAL 0DGT1 OSCILLATION SIGNAL 1DGT2 OSCILLATION SIGNAL 2HTRD FIXING HEATER DRIVE COMMANDHVPAC PRIMARY AC BIAS ON COMMANDHVPDC PRIMARY DC BIAS ON COMMANDHVPHO PRIMARY DC BIAS HIGH OUTPUT COMMANDHVTDC TRANSFER DC BIAS ON COMMANDKEYR0 RETURN SIGNAL 0KEYR1 RETURN SIGNAL 1LAPWM LAMP DRIVE COMMAND[LID] LAMP INTENSITY DETECTION SIGNALMMCLK MAIN MOTOR CLOCK PULSE SIGNALMMD MAIN MOTOR DRIVE COMMANDPWOFF POWER OFF COMMANDPWSON POWER SWITCH ON SIGNALPUSD PICK-UP ROLLER SOLENOID DRIVE COMMANDRELAYED RELAY DRIVE COMMANDRGSD REGISTRATION SOLENOID DRIVE COMMAND[TH1] THERMISTOR SIGNAL 1TREV TRANSFER REVERSE DC BIAS ON COMMANDVPEAK VOLTAGE PEAK DETECT SIGNALZXDP ZERO CROSS DETECTION SIGNAL


APPENDIX

2. Abbreviations

INTR INITIAL ROTATIONLSTR LAST ROTATIONCBFW COPYBOARD FORWARDCBRV COPYBOARD REVERSESTBY STANDBY

COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON) A-5

100V

HOT

RETURN

SW1 SW2

J104

1 2

J108 JP350

J906F

J906PP

J906

J908F J909F

J908P J909P

J101

Q902

J905F

J905

1 2 3

J902

J906PP

J902F

21

SL2

J901

J901PP

J901F

21

SL1

M

J903F

J903

Q901

J904F

J904


1 2 31 2

1 21 2

123456789101112

R5

J201 J5 J6 J7

T P B G

LEG

DG

T0

KE

YR

0

CB

SD

CB

SP

RG

SD

+24

V

+24

VM

MD

LEG

+5V

MM

CLK

J907

F

1 2 3 4 5

Q801

J801123

1 2 3 4

J603P J621P

J621FJ603F


Sca

nn

ig la

mp

PC

B

Door switch Delivery door switch

1 2 3

123

1

1

1

1

13

GN

D

TH

1

DG

T1

LEG

KE

YR

O

2NC

J102

J103

J907

Intensity sensor

Main motor

Delivery sensor

N.C N.C

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

J202

1234567891011121314151617G

ND

+5V DG

T2

DG

T0

GN

D

SE

G2

S_C

HE

CK

DG

T1

PW

SO

N

VR

KE

YR

0

TH

1

LID

S_C

LK

S_O

UT

S_I

N

+24

V

J601

HOT

J1

RETURN

120/230V

J8

The

rmal

fuse

2

FU

2

Fix

ing

heat

er H

1

TH1

Fixing heater temperature sensor

Control panel PCB

Registrationsolenoid

Copyboard drive solenoid

Copyboard position detection

M1

PD601

BKW

BKW

R Y Y

BK W

R Y Y

BK

/W

W

YBL

BL Y

R Y

W W W W W W W W W W W W W W W W W

V V VV V

Y YPK

PK

V V V

BKBLBRGYGNORPKRSBVWYYG

BlackBlueBrownGrayGreenOrangePinkRedSky BlueVioletWhiteYellowYellow Green

Color Code

9 8 7 6 5 4 3 2 1

I

H

G

F

E

D

C

B

A

C. GENERAL CIRCUIT DIAGRAMPC400/FC200 GENERAL CIRCUIT DIAGRAM


PC420/430/FC220 GENERAL CIRCUIT DIAGRAM

9 8 7 6 5 4 3 2 1

I

H

G

F

E

D

C

B

A

HOT

RETURN

SW1 SW2

J104

1 2J108 JP350

J906F

J906PP

J906

J908F J909F

J908P J909P

J101

Q902

J905F

J905

Copyboard positiondetection

1 2 3

J902

J906PP

J902F

21

SL2

J901

J901PP

J901F

21

SL1

M

J903F

J903

Q901

J904F

J904


1 2 31 2

1 21 2

123456789101112

1 2 3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20 21 22

R5

J201 J5 J6 J7

T

J202

P B G

LEG

DG

T0

KE

YR

0

CB

SD

CB

SP

PU

SD

+24

V

+24

V

MM

D

LEG

+5V

MM

CLK

12345678910111213141516171819202122J9

07F

1 2 3 4 5

Q801

J801123

1 2 3 4

J603P J621P

AE sensor Intensity sensor

J621FJ603F

Control panel PCB


Sca

nn

ig la

mp

PC

B

Door switch Delivery door switch

1 2 3

123

13

GN

D

+5V

DG

T2

DG

T0

GN

D

SE

G2

S_C

HE

CK

DG

T1

PW

SO

N

VR

KE

YR

0

TH

1

LID

S_C

LK

S_O

UT

S_I

N

+24

V

SE

G0

AE

SE

G1

KE

YR

2

KE

YR

3

GN

D

TH

1

DG

T1

LEG

KE

YR

O

2NC

J102

J103

J907

Main motor

J601

HOT

J1

RETURN

120/230V

100VT

her

mal

fu

se 2

FU

2

H1

Fix

ing

hea

ter

Fixing heatertemperature sensor

Delivery sensor

TH1 PD602 PD601

J8

M1

Pick-upsolenoid

Copyboarddrive solenoid

BKBLBRGYGNORPKRSBVWYYG

BlackBlueBrownGrayGreenOrangePinkRedSky BlueVioletWhiteYellowYellow Green

Color Code

BKW

BKW

R Y Y

R Y Y

BK W

BK

/W

W

YBL

BL

Y Y

R YRY

W W W W W W W W W W W W W W W W W W W W W W W

V V V

PK

PK Y Y

V V V V V


APPENDIX

A-7

D. SPECIAL TOOLS TABLEWhat follows below is a table of special tools used for servicing the machine in

addition to the standard tools set.

*The tools are categorized as follows:A: tools that must be carried by each service person.B: tools that must be carried by a group of about five service persons.C: tools that must be kept by each workshop.

No. Tool name Tool Number Shape Category* Remarks

1 Digital multimeter

CK-0552 B For adjusting the AE mechanism.


APPENDIX

E. SOLVENTS/OILS TABLENo.

1

Name Uses Composition Remarks

Alcohol Cleaning:e.g., glass, plastic, rubber parts; external covers

Hydrocarbon (fluorine family)AlcoholSurface active agent

• Do not bring near fire.• Procure locally.• Isopropyl alcohol may be

substituted.

2 Solvent Cleaning:e.g., metal; oil or toner dirt

Hydrocarbon (fluorine/chlorine family)Alcohol

• Do not bring near fire.• Procure locally.

3 Heat-resisting grease

Lubricating:drive assemblies

Lithium soap(mineral oil family)Molybdenum bisulfate

• CK-0427 (500 g/can)

4 Lubricating oil Mineral oil (paraffin family) • CK-0451 (100 cc)

5 Lubricating oil Mineral oil (paraffin family) • CK-0524 (100 cc)

Prepared byOFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DEPARTMENT 1

OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DIVISIONCANON INC.

Printed in Japan

REVISION 0 (JAN. 1998) [23715]

5-1, Hakusan 7-chome, Toride-shi, Ibaraki 302 Japan

PRINTED IN JAPAN (IMPRIME AU JAPON) 0198M2.01-1

This publication is printed on

70% reprocessed paper.